JP2015192480A - Solar cell module and method for manufacturing solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the productivity of a solar cell module while maintaining satisfactory attachment structure of a terminal box.SOLUTION: A solar cell module 10 includes: a solar cell panel 11; a frame 21 attached to an edge part 11c of the solar cell panel 11; a terminal box 30 disposed on the solar cell panel 11 formed with a through hole 34 for laying a wire 18 pulled out from the panel in a panel-facing plane 32a; a 1-component curable adhesive 40 interposing between the terminal box 30 and the frame 21; and a 2-component curable adhesive 41 filled in the terminal box 30 as well as between the panel-facing plane 32a and solar cell panel 11 via the through hole 34.

Description

  The present invention relates to a solar cell module and a method for manufacturing a solar cell module.

  A solar cell module in which a terminal box is attached on a solar cell panel using an adhesive tape or an adhesive is known (for example, see Patent Document 1). In Patent Document 1, after a terminal box is pasted on a back reinforcing plate using a double-sided tape, a filler is put in the terminal box until the elastic polymer sealing material embedded between the through hole and the lead wire is hidden. A method for mounting a terminal box to be filled is disclosed.

Japanese Patent Laid-Open No. 7-273361

  By the way, the mounting structure of the terminal box is required to be able to stably fix the terminal box to the solar cell panel and to ensure sufficient insulation between the wirings. For this reason, careful work is required when attaching the terminal box. On the other hand, in the terminal box attachment process, it is desired to reduce the working load and shorten the process time.

  The solar cell module according to the present invention has a solar cell panel, a frame attached to the edge of the solar cell panel, a through hole arranged on the solar cell panel and through which wiring drawn from the panel is opposed to the panel. A terminal box formed on the surface, a one-component curable adhesive interposed between the terminal box and the frame, and the terminal box is filled with the panel facing surface and the solar cell panel through the through hole. And a two-component curable adhesive filled therebetween.

  A method for manufacturing a solar cell module according to the present invention includes a solar cell panel, a frame attached to an edge portion of the solar cell panel, a through-hole for passing wirings arranged on the solar cell panel and drawn from the panel. Is a method of manufacturing a solar cell module comprising a terminal box formed on the panel facing surface, wherein at least one liquid curable adhesive is applied between the solar cell panel and the frame, and the wiring is drawn from the through hole. Place the terminal box on the solar cell panel so that the one-component curable adhesive is interposed between the terminal box and the frame, and fill the terminal box with the two-component curable adhesive, The two-component curable adhesive is poured into a gap formed between the panel facing surface and the solar cell panel, and the one-component curable adhesive and the two-component curable adhesive are cured.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining the favorable attachment structure of a terminal box, it becomes possible to reduce the working load in the attachment process of a terminal box, and shorten process time, and can improve the productivity of a solar cell module.

It is sectional drawing of the solar cell module which is an example of embodiment of this invention. It is the A section enlarged view of FIG. In the solar cell module which is an example of embodiment of this invention, it is the figure which looked at the terminal box from the panel opposing surface side. It is a figure for demonstrating the manufacturing process of the solar cell module which is an example of embodiment of this invention. It is a figure which shows the solar cell module which is another example of embodiment of this invention. It is a figure which shows the solar cell module which is another example of embodiment of this invention.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
The drawings referred to in the embodiments are schematically described, and the dimensional ratios of the components drawn in the drawings may be different from the actual products. Specific dimensional ratios and the like should be determined in consideration of the following description.

  In this specification, the “light receiving surface” of the solar cell module, solar cell panel, solar battery cell, and photoelectric conversion unit means a surface on which light is mainly incident, and “back surface” is the opposite side of the light receiving surface. Means a face. Of the light incident on the solar cell module, for example, more than 50% to 100% of the light enters from the light receiving surface side.

  Hereinafter, for convenience of explanation, terms indicating directions are used. With respect to the frames 20, 21, and 22 and the terminal box 30, the direction along the thickness direction of the solar cell panel 11 is “up-down direction”, and the light receiving surface 11 a side of the solar cell panel 11 is up. The direction perpendicular to the vertical direction and the longitudinal direction of each frame is referred to as a “lateral direction”. The cross section of each frame means a cross section in a direction (vertical direction / horizontal direction) orthogonal to the longitudinal direction unless otherwise specified.

  Hereinafter, the solar cell module 10 which is an example of embodiment of this invention is demonstrated in detail, referring FIGS. 1-4.

FIG. 1 is a cross-sectional view of the solar cell module 10.
As shown in FIG. 1, the solar cell module 10 includes a solar cell panel 11, a frame 20 attached to an edge portion of the panel, and a terminal box 30 disposed on the panel. As will be described in detail later, in the solar cell module 10, the terminal box 30 is attached on the back surface 11 b of the solar cell panel 11 using the one-component curable adhesive 40 and the two-component curable adhesive 41.

  The solar battery panel 11 includes a plurality of solar battery cells 12, a first protective member 13 provided on the light receiving surface side of the solar battery cell 12, and a second protective member 14 provided on the back surface side of the solar battery cell 12. Have The solar battery cell 12 is sandwiched between the first protective member 13 and the second protective member 14 and sealed with a sealing layer 15 provided between the protective members. The sealing layer 15 is also called a filler layer. The solar battery panel 11 is a plate-like body in which strings of solar battery cells 12 to be described later are sandwiched between the protective members. For example, the solar battery panel 11 has a substantially rectangular shape in plan view (when viewed from a direction perpendicular to the panel surface). Have

  In the present embodiment, the plurality of solar battery cells 12 are arranged on substantially the same plane. Adjacent solar cells 12 are connected in series by a conductive wire 16, whereby a string of solar cells 12 is formed. The conducting wire 16 bends in the thickness direction of the module between adjacent solar cells 12 and is attached to the light receiving surface of one solar cell 12 and the back surface of the other solar cell 12 using an adhesive or the like. A part of the conducting wire 16 extends from the end of the string and is connected to the crossing conducting wire 17. A wiring 18 that is drawn out to the back side of the second protective member 14 and drawn into the terminal box 30 is connected to the connecting wire 17.

  The photovoltaic cell 12 includes a photoelectric conversion unit that generates carriers by receiving sunlight. The photoelectric conversion unit includes a light receiving surface electrode formed on the light receiving surface of the photoelectric conversion unit and a back electrode formed on the back surface (both not shown) as electrodes for collecting the generated carriers. A conductive wire 16 is electrically connected to each electrode. However, the structure of the photovoltaic cell 12 is not limited to this, For example, the structure in which the electrode was formed only on the back surface of a photoelectric conversion part may be sufficient. The back electrode is preferably formed in a larger area than the front electrode, and the surface having the larger electrode area (or the surface on which the electrode is formed) can be said to be the “back surface” of the solar battery cell 12.

The photoelectric conversion unit includes, for example, a semiconductor substrate such as crystalline silicon (c-Si), gallium arsenide (GaAs), and indium phosphide (InP), an amorphous semiconductor layer formed on the semiconductor substrate, and an amorphous semiconductor A transparent conductive layer formed on the layer. As a specific example, an i-type amorphous silicon layer, a p-type amorphous silicon layer, and a transparent conductive layer are sequentially formed on one surface of an n-type single crystal silicon substrate, and an i-type non-crystalline layer is formed on the other surface. Examples include a structure in which a crystalline silicon layer, an n-type amorphous silicon layer, and a transparent conductive layer are formed in this order. The transparent conductive layer is preferably composed of a transparent conductive oxide obtained by doping Sn, Sb or the like with a metal oxide such as indium oxide (In ₂ O ₃ ) or zinc oxide (ZnO).

  For the first protective member 13, a translucent member such as a glass substrate, a resin substrate, or a resin film can be used. Among these, it is preferable to use a glass substrate from the viewpoints of fire resistance, durability, and the like. In the present embodiment, a glass substrate is used as the first protective member 13. The thickness of the glass substrate is, for example, about 2 to 6 mm.

  The second protective member 14 may be the same transparent member as the first protective member 13 or may be an opaque member. In the present embodiment, a glass substrate is used as the second protective member 14. A glass substrate that is slightly smaller than the first protective member 13 is used for the second protective member 14 in order to form a protruding portion 13c described later.

  The frame 20 is a metal frame such as stainless steel or aluminum, for example, and protects the edge of the solar cell panel 11 and is used when the solar cell module 10 is installed on a roof or the like. In the present embodiment, the frame 20 is configured by combining a plurality of frames 21 and 22 and the like. The frame 21 is attached to the end edge portion 11c of the solar cell panel 11 from which the wiring 18 is drawn, and the frame 22 is attached to the end edge portion 11d facing the end edge portion 11c. In addition to the frames 21 and 22, two frames (not shown) connected to these are provided on the edge portion of the solar cell panel 11.

  The frame 21 includes, for example, a main body portion 23 having a hollow structure and a flange portion 24 that covers the light receiving surface 11 a of the solar cell panel 11. Between the main body part 23 and the flange part 24, a groove part 25 into which the end edge part 11c of the solar cell panel 11 is fitted is formed. As will be described later, only the overhang portion 13c (first protection member 13) is fitted into the groove portion 25. Inside the main body 23, for example, a corner piece (not shown) used for connection to another frame is press-fitted.

  The collar portion 24 of the frame 21 has a substantially L shape in cross-sectional view. As for the collar part 24, the base part connected with the main-body part 23 is extended in the predetermined length along the outer side surface 23a of the main-body part 23, bends in the middle, and is extended along the light-receiving surface 11a of the solar cell panel 11. . The predetermined length is set to a length that can stably support the overhanging portion 13c fitted in the groove portion 25. In the present embodiment, the flange portion 24 covers the terminal box 30 so that the terminal box 30 cannot be seen from the light receiving surface 11a side.

  Like the frame 21, the frame 22 has a main body portion 26 and a flange portion 27, and a groove portion 28 into which the end edge portion 11 d of the solar cell panel 11 is fitted is formed between the main body portion 26 and the flange portion 27. Has been. The collar part 27 has a substantially L shape in cross-section, but differs from the collar part 24 in that the lateral length is substantially the same as the main body part 26. Further, since the first protective member 13 and the second protective member 14 are fitted into the groove portion 28, the length in the vertical direction is longer than that of the groove portion 25.

  In the present embodiment, the first protection member 13 projects from the end of the second protection member 14 at the end edge portion 11c from which the wiring 18 is drawn, and the projecting portion 13c is formed. In other edge portions including the edge portion 11d, the end of the first protection member 13 and the end of the second protection member 14 coincide. That is, the first protective member 13 extends from the end of the second protective member 14 only at the end edge portion 11c. Only the overhang portion 13 c is fitted into the groove portion 25 of the frame 21. Thereby, a gap is formed between the frame 21 and the end of the second protective member 14. By using the gap, the wiring 18 drawn from between the protective members is drawn into the terminal box 30 without being interfered with the frame 21.

  The terminal box 30 is attached to the edge part 11c of the solar cell panel 11 in which the overhang | projection part 13c was formed. The shape of the terminal box 30 is not specifically limited, For example, it has a substantially rectangular parallelepiped shape. In the present embodiment, the terminal box 30 is disposed along the longitudinal direction of the frame 21 so as to be in contact with the inner side surface 23 b of the main body 23. Cables 35 (see FIG. 3) connected to an external device extend from both sides of the terminal box 30 in the longitudinal direction.

  Hereinafter, the terminal box 30 and its mounting structure will be described in detail with reference to FIGS. 2 and 3 as appropriate. FIG. 2 is an enlarged view of part A in FIG. FIG. 3 is a view of the terminal box 30 as viewed from the panel facing surface 32a side, and is a view showing the arrangement of the one-component curable adhesive 40 and the two-component curable adhesive 41 on the panel facing surface 32a.

  As shown in FIG. 2, the terminal box 30 contains a terminal block 31 to which the wiring 18 is connected. For example, a plurality of wirings 18 are drawn out from between the protective members of the edge portion 11 c, and a plurality of terminal blocks 31 are provided corresponding to the number of wirings 18. For example, the terminal box 30 includes a cover main body 32 that houses the terminal block 31 and a bottom lid 33 that closes an opening of the cover main body 32. In the present embodiment, the cover main body 32 is joined to the solar cell panel 11 and the frame 20 using two types of adhesives (one-liquid curable adhesive 40 and two-liquid curable adhesive 41).

  A one-component curable adhesive 40 is provided between the protruding portion 13c of the solar cell panel 11 and the frame 21, that is, in the groove portion 25 into which the protruding portion 13c is fitted. The one-part curable adhesive 40 is also provided in the groove portion 28 of the frame 22. The one-component curable adhesive 40 is also provided in a groove portion of another frame, and joins the edge portion of the solar cell panel 11 and the frame 20.

  As shown in FIG. 3, a through hole 34 for passing the wiring 18 is formed in the panel facing surface 32 a of the terminal box 30. The through hole 34 is formed, for example, through the cover body 32 in the vertical direction, and is provided at a position away from the edge of the panel facing surface 32a. The shape of the through hole 34 is not particularly limited, and the wiring 18 can be inserted. When the two-liquid curable adhesive 41 is filled in the terminal box 30, the two-liquid curable type is formed from the gap between the wiring 18 and the through-hole 34. What is necessary is just to have the hole diameter which the adhesive agent 41 can flow out. A plurality of through holes 34 are formed corresponding to the number of wirings 18, for example, but may be one long hole through which the plurality of wirings 18 pass. In addition to the through hole 34, a through hole through which the two-component curable adhesive 41 flows out may be formed in the panel facing surface 32a.

  As described above, the terminal box 30 is joined to the solar cell panel 11 and the frame 20 using the one-component curable adhesive 40 and the two-component curable adhesive 41. The one-component curable adhesive 40 is interposed at least between the terminal box 30 and the frame 20. The two-component curable adhesive 41 is filled in the terminal box 30 and is filled between the panel facing surface 32 a and the solar cell panel 11 through the through hole 34. That is, the two-component curable adhesive 41 is a potting agent (filler) that seals the terminal block 31 and the like, and also serves to bond the terminal box 30 and the solar cell panel 11.

  The one-component curable adhesive 40 may be a thermosetting or ultraviolet curable adhesive, but is preferably a moisture curable adhesive from the viewpoint of material cost and productivity. Examples of the moisture-curable adhesive include urethane-based, epoxy-based, and silicone-based moisture-curable adhesives. Of these, silicone moisture curable adhesives are particularly preferred. The viscosity of the moisture curable adhesive before curing is, for example, about 20000 mPa · S to 200000 mPa · S, and preferably about 30000 mPa · S to 150,000 mPa · S.

  The one-component curable adhesive 40 is interposed between the frame facing surface 32 b of the cover main body 32 and the inner side surface 23 b of the frame 21. Thereby, the terminal box 30 can be joined not only to the back surface 11b of the solar cell panel 11 but also to the frame 21, and the terminal box 30 can be stably fixed. The one-component curable adhesive 40 is provided, for example, in 50% or more of the gap between the frame facing surface 32b and the inner side surface 23b, and preferably provided in substantially the entire region so as not to form a large space in the gap.

  The one-pack curable adhesive 40 is preferably interposed between the edge portion of the panel facing surface 32a and the solar cell panel 11. The one-component curable adhesive 40 is provided in a strip shape along the contour line of the panel facing surface 32a so as not to block the through hole 34 on the panel facing surface 32a, for example (see FIG. 3). That is, the periphery of the region sandwiched between the panel facing surface 32 a and the solar cell panel 11 is surrounded by the one-component curable adhesive 40. As will be described in detail later, the one-component curable adhesive 40 functions as a bank for blocking outflow of the two-component curable adhesive 41 in the process of attaching the terminal box 30.

In this embodiment, since the overhang | projection part 13c is formed in the edge part 11c of the solar cell panel 11 to which the terminal box 30 is attached, the terminal box 30 has the back surface 13b of the exposed 1st protection member 13, and 2nd The protective member 14 is bonded to the back surface 14b. The distance L ₁₃ between the back surface ₁₃ b and the panel facing surface 32 a is longer than the distance L ₁₄ between the back surface 14 b and the panel facing surface 32 a by the thickness of the second protective member 14 and the sealing layer 15. That is, the gap region R ₁₃ which is located between the back surface 13b and the panel-facing surface 32a is larger than the gap region R ₁₄ which is located between the back surface 14b and the panel-facing surface 32a. Further, since the gap region R ₁₃ is sandwiched between the solar cell panel 11, the terminal box 30 and the frame 21, moisture hardly acts on the adhesive filled in the gap region R ₁₃ .

  The two-component curable adhesive 41 is an adhesive including a main agent and a curing agent. For example, the curing time is shorter than that of a moisture curable adhesive, and the curing time can be easily adjusted depending on the type and amount of the curing agent. Examples of the two-component curable adhesive 41 include acrylic, urethane-based, epoxy-based, and silicone-based two-component curable adhesives. Of these, a silicone-based two-component curable adhesive is particularly preferable. The viscosity of the two-component curable adhesive 41 before curing (viscosity immediately after mixing the main agent and the curing agent) is, for example, about 1000 mPa · S to 20000 mPa · S, and preferably about 5000 mPa · S to 15000 mPa · S. . The two-component curable adhesive 41 contains a catalyst such as platinum.

  The two-component curable adhesive 41 is filled in the terminal box 30, that is, in the cover main body 32. The two-component curable adhesive 41 is preferably filled up to a position where the terminal block 31 is completely filled. Further, the two-component curable adhesive 41 is also filled between the panel facing surface 32 a of the terminal box 30 and the solar cell panel 11. Further, the two-component curable adhesive 41 may be provided between the terminal box 30 and the frame 20. Since the two-component curable adhesive 41 has low viscosity and high fluidity before curing, the one-component curable adhesive 40 is applied to a region sandwiched between the solar cell panel 11, the terminal box 30, and the frame 21. When there is no gap, it easily flows into the gap.

  The two-component curable adhesive 41 is filled in the gap between the panel facing surface 32 a and the solar cell panel 11 through the through hole 34. In the filling operation of the two-component curable adhesive 41, it is possible to change the type of the adhesive during the filling, but preferably one type of adhesive is used. That is, the gap and the terminal box 30 are filled with the same adhesive. The gap between the wiring 18 and the through hole 34 is also closed with the two-component curable adhesive 41.

  The two-component curable adhesive 41 is filled in a region surrounded by the one-component curable adhesive 40 between the panel facing surface 32 a and the solar cell panel 11. That is, the two-component curable adhesive 41 is filled in most of the gap between the panel facing surface 32a and the solar cell panel 11 except on the edge of the panel facing surface 32a. That is, the two-component curable adhesive 41 is filled on the central portion of the panel facing surface 32a where moisture hardly acts.

The two-part curable adhesive 41 is preferably provided more than the one-part curable adhesive 40 in at least the gap region R ₁₃ between the panel facing surface 32 a and the solar cell panel 11. Gap region R ₁₃ is vertically long and the solar cell panel 11, the terminal box 30, and because it is a region sandwiched between the frame 21, wherein the one-component curable adhesive 40 (moisture-curing adhesive) If many are provided, it will take a long time to cure. That is, to reduce the filling amount of one-component curable adhesive 40 in gap region R _13, by increasing the filling amount of two-component curable adhesive 41, greatly reduce the curing time of the adhesive (curing time) It becomes possible to do.

Filling amount of two-component curable adhesive 41, the gap region R ₁₄ Oite also it is preferable greater than loadings of 1-component curable adhesive 40. Filling amount of two-component curable adhesive 41 in the panel-facing surface 32a and the gap between the solar cell panel 11 (gap region R ₁₃ and gap region R _14), based on the total filling amount of the adhesive, 60 to 95 volume % Is preferable, and about 70 to 90% by volume is more preferable.

  Hereinafter, an example of a method for manufacturing the solar cell module 10 having the above configuration will be described in detail with reference to FIG. FIG. 4 is a diagram illustrating a process for attaching the terminal box 30.

  In the manufacturing process of the solar cell module 10, the solar cell panel 11 is first prepared. The solar battery panel 11 is manufactured by laminating the strings of the solar battery cells 12 connected by the conductive wires 16 using the resin sheets constituting the first protective member 13, the second protective member 14, and the sealing layer 15. it can. A glass substrate that is slightly smaller than the glass substrate of the first protection member 13 is used for the second protection member 14. In the laminating step, the overhanging portion 13c is formed by extending the first protective member 13 from the end of the second protective member 14 only at the edge portion 11c of the solar cell panel 11. Then, the wiring 18 is pulled out from the end edge portion 11c to the back surface 11b side.

As shown in FIG. 4, the attachment process of the terminal box 30 includes the following (a) to (d).
(A) A one-component curable adhesive 40 is applied at least between the solar cell panel 11 and the frame 20. As the one-component curable adhesive 40, it is preferable to use a moisture curable adhesive from the viewpoint of material cost and productivity.
(B) Next, the wiring 18 is drawn into the terminal box 30 from the through hole 34, and the terminal box 30 is connected to the solar cell so that the one-component curable adhesive 40 is interposed between at least the terminal box 30 and the frame 20. It arrange | positions on the back surface 11b of the panel 11. FIG. At this time, the terminal box 30 is arranged so that the surface (panel facing surface 32a) on which the through hole 34 is formed faces the back surface 11b.
(C) Next, the two-pack curable adhesive 41 is filled in the terminal box 30, and the two-pack curable type is formed in the gap 42 formed between the panel facing surface 32 a and the solar cell panel 11 from the through hole 34. Adhesive 41 is poured. That is, the two-component curable adhesive 41 is filled into the gap 42 and the cover main body 32 by injecting the two-component curable adhesive 41 from the opening of the cover main body 32.
(D) Finally, the one-component curable adhesive 40 and the two-component curable adhesive 41 are cured.

  In the example shown in FIG. 4, the steps (a) to (d) are performed with the light receiving surface 11 a of the solar cell panel 11 facing vertically downward. For example, except for the steps (a) and (b) The light receiving surface 11a may be directed vertically upward.

  In the step (a), the one-component curable adhesive 40 is applied (filled) to the groove portion 25 in which the overhang portion 13c is fitted. The one-part curable adhesive 40 is also applied to the groove portion 28 of the frame 22 and the groove portions of other frames. Application of the one-component curable adhesive 40 is performed using, for example, a dispenser, a caulking gun, or the like. The viscosity of the one-component curable adhesive 40 is, for example, about 30000 mPa · S to 150,000 mPa · S and has low fluidity, and therefore generally remains in the applied portion. Subsequently, the edge portion of the solar cell panel 11 is fitted into the groove portion to which the one-component curable adhesive 40 is applied. The frame 20 is formed by connecting a plurality of frames with corner pieces, for example, and is attached so as to surround the four sides of the solar cell panel 11.

  In the step (a), it is preferable to apply the one-component curable adhesive 40 to the inner side surface 23b of the main body 23 simultaneously with or after the one-component curable adhesive 40 is applied to the groove portion. Alternatively, the one-component curable adhesive 40 may be applied to the frame facing surface 32 b of the terminal box 30.

  In the step (b), the wiring 18 is first drawn from the through hole 34 of the terminal box 30 and connected to the terminal block 31. Alternatively, the wiring 18 may be connected to the terminal block 31 after the terminal box 30 is arranged on the back surface 11 b of the solar cell panel 11. After drawing the wiring 18 into the terminal box 30, the side surface (frame facing surface 32b) of the cover main body 32 and the inner side surface 23b of the main body portion 23 coated with the one-component curable adhesive 40 are opposed to each other. The terminal box 30 is disposed on the back surface 11 b of the solar cell panel 11. Then, the frame facing surface 32b and the inner side surface 23b are joined by the one-pack curable adhesive 40.

  In the step (b), the frame opposing surface 32b and the inner side surface 23b are joined, and at the same time, the surface on which the through hole 34 is formed (panel opposing surface 32a) faces the solar cell panel 11 side, and the terminal box 30 is connected to the solar cell. It arrange | positions on the back surface 11b of the panel 11. FIG. At this time, for example, the one-component curable adhesive 40 is applied on the panel facing surface 32a. The one-component curable adhesive 40 is preferably applied in a band shape along the contour line of the panel facing surface 32a so as not to block the through hole 34. That is, the one-component curable adhesive 40 is applied only on the edge portion of the panel facing surface 32a. As a result, the center of the gap 42 is not filled with the one-component curable adhesive 40, and the periphery of the gap 42 is surrounded by the two-component curable adhesive 41. For example, the gap 42 is a substantially closed space connected to the outside only through the through hole 34.

In the step (c), the two-component curable adhesive 41 is filled in the terminal box 30, that is, in the cover body 32. The two-component curable adhesive 41 is filled from the opening of the cover main body 32 that is directed vertically upward. Through the filling operation, the two-component curable adhesive 41 flows into the gap 42 between the panel facing surface 32 a and the solar cell panel 11 through the gap between the through hole 34 and the wiring 18. A region surrounded by the one-component curable adhesive 40 gap 42, i.e. in the gap region R ₁₃ and gap region R ₁₄ is two-part curable adhesive 41 is filled.

  The two-component curable adhesive 41 is preferably adjusted by mixing the main agent and the curing agent immediately before the filling operation. Since the viscosity of the two-component curable adhesive 41 immediately after mixing the main agent and the curing agent is, for example, about 5000 mPa · S to 15000 mPa · S, the two-component curable adhesive 41 injected from the opening of the cover body 32. Flows into the gap 42 through the through hole 34. Since the gap 42 is a substantially closed space as described above, the two-part curable adhesive 41 is filled so as to completely fill the gap 42 without flowing out of the gap 42.

  When the gap 42 is filled with the two-component curable adhesive 41, the two-component curable adhesive 41 starts to accumulate in the cover body 32. The two-component curable adhesive 41 is preferably filled up to a position where the terminal block 31 is completely filled.

In the step (d), the one-component curable adhesive 40 and the two-component curable adhesive 41 are cured. Curing is performed at room temperature, for example. When the one-component curable adhesive 40 is a moisture curable adhesive, it is cured by the action of moisture in the atmosphere, for example. The two-component curable adhesive 41 is cured by a reaction between the main agent and the curing agent. Curing time of the adhesive (curing time) is usually is a one-liquid curing time of curing adhesive 40> curing time of two-part curable adhesive 41, moisture is hardly acts gap region R _13, etc. 2 By filling a large amount of the liquid curable adhesive 41, the step (d) can be greatly shortened.

  As described above, according to the above manufacturing method, it is possible to reduce the operational load in the process of attaching the terminal box 30 and shorten the process time, and the productivity of the solar cell module 10 can be improved.

For example, when the gap 42 (gap region R ₁₃ and gap region R ₁₄ ) formed between the panel facing surface 32a and the solar cell panel 11 is filled with only the one-component curable adhesive 40, as described above. Not only does the curing time become long, but it also takes a long time to apply the adhesive. According to the manufacturing method described above, the one-component curable adhesive 40 may be applied only on the edge portion of the panel facing surface 32a, and the two-component curable adhesive 41 having high fluidity is applied to the center of the gap 42. Since it only needs to be poured, the adhesive application time can be greatly shortened, and the work load can be reduced. The productivity of the solar cell module 10 is greatly improved by shortening the application time and curing time of the adhesive.

  In the solar cell module 10 obtained by the above manufacturing method, the terminal box 30 is stably fixed to the solar cell panel 11 and the frame 21. Further, the insulation between the wirings 18 is sufficiently ensured.

The above embodiment can be appropriately changed in design as long as the object of the present invention is not impaired.
For example, as shown in FIGS. 5A and 5B, instead of the one-component curable adhesive 40, an elastic member 43 (for example, a rubber material or foamed material) is formed between the edge of the panel facing surface 32 a and the solar cell panel 11. Body) may be provided. The elastic member 43 is provided along, for example, three sides of the four sides of the panel facing surface 32a excluding the side close to the frame 21. The elastic member 43 is compressed and deformed by being pressed against the back surface 11b of the solar cell panel 11, and functions as a bank for damming the two-component curable adhesive 41. Further, by the elastic member 43 provided along the three sides, it is possible to increase the filling amount of two-component curable adhesive 41 in gap region R _13.

  Instead of providing the elastic member 43, a convex portion integrally formed with the cover main body 32 may be formed on the panel facing surface 32a. Instead of the elastic member 43, the one-component curable adhesive 40 may be applied along the three sides of the panel facing surface 32a.

DESCRIPTION OF SYMBOLS 10 Solar cell module, 11 Solar cell panel, 11a Light-receiving surface, 11b, 13b, 14b Back surface, 11c, 11d Edge part, 12 Solar cell, 13 1st protection member, 13c Overhang | projection part, 14 2nd protection member, 15 Sealing layer, 16 conductor, 17 crossover conductor, 18 wiring, 20, 21, 22 frame, 23, 26 body, 23a outer surface, 23b inner surface, 24, 27 collar, 25, 28 groove, 30 terminal box, 31 Terminal block, 32 Cover body, 32a Panel facing surface, 32b Frame facing surface, 33 Bottom cover, 34 Through hole, 35 Cable, 40 1-component curable adhesive, 41 2-component curable adhesive, 42 Clearance, 43 Elasticity Member, R ₁₃ , R ₁₄ gap region

Claims (5)

A solar panel,
A frame attached to an edge of the solar cell panel;
A terminal box disposed on the solar cell panel and having a through-hole formed in the panel-facing surface for passing wiring drawn from the panel;
A one-component curable adhesive interposed between the terminal box and the frame;
A two-component curable adhesive filled in the terminal box and filled between the panel facing surface and the solar cell panel through the through hole,
A solar cell module comprising: The one-component curable adhesive is interposed between an edge of the terminal box and the solar cell panel,
2. The solar cell according to claim 1, wherein the two-component curable adhesive is filled in a region between the panel facing surface and the solar cell panel and surrounded by the one-component curable adhesive. module. The solar panel includes a plurality of solar cells, a first protective member provided on the light receiving surface side of the solar cell, and a second protective member provided on the back side of the solar cell. ,
The first protection member protrudes from an end of the second protection member at the end edge portion of the solar cell panel where the terminal box is disposed,
The two-component curable adhesive is more than the one-component curable adhesive between the panel-facing surface of the terminal box and the back surface of the first protective member protruding from the end of the second protective member. The solar cell module according to claim 1 or 2, which is filled in a large amount. A solar panel,
A frame attached to an edge of the solar cell panel;
A terminal box disposed on the solar cell panel and having a through-hole formed in the panel-facing surface for passing wiring drawn from the panel;
A solar cell module manufacturing method comprising:
Applying a one-component curable adhesive at least between the solar cell panel and the frame,
The terminal box is arranged on the solar cell panel so that the wiring is drawn from the through hole, and the one-component curable adhesive is interposed between the terminal box and the frame,
Filling the terminal box with a two-component curable adhesive, and pouring the two-component curable adhesive into the gap formed between the panel facing surface and the solar cell panel from the through hole,
A method for manufacturing a solar cell module, wherein the one-component curable adhesive and the two-component curable adhesive are cured. Applying the one-component curable adhesive between the edge of the terminal box and the solar cell panel,
The method for manufacturing a solar cell module according to claim 4, wherein the two-component curable adhesive is filled in a region surrounded by the one-component curable adhesive in the gap.

Images