JP2006190768A - Solar battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the joining strength of a terminal box, facilitate a manufacturing operation, make a gap hard to occur on a joining surface of the terminal box, and reduce the number of components. <P>SOLUTION: The terminal box 14 has a box engaging part 14a. A rear reinforcing member 13 is formed on the rear face of a solar battery element 12. Thereafter, an opening is formed at the rear reinforcing member 13. A rear engaging part 13a has part of the reinforcing member 13 formed to protrude from the periphery of the opening toward the rear face of the solar battery element 12. The terminal box 14 is placed to cover the opening. Thereafter, the terminal box 14 is attached to the rear reinforcing member 13 by joining the rear engaging part 13a and the box engaging part 14a via an adhesive. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a solar cell module, and more particularly to a solar cell module having a solar cell element that converts light energy into electrical energy.

  Currently, environmentally friendly energy is attracting attention from the viewpoint of environmental protection. In particular, since the solar cell module is a power generation device that generates electric energy from the light energy of the sun, it has attracted attention as a very clean power generation device. Specifically, the amount of solar cell modules introduced has increased due to the progress of solar cell module technology and national policies.

  In this solar cell module, the solar cell element is sealed with EVA (ethylene vinyl acetate) or the like, glass, an organic resin, a weather resistant film or the like is disposed on the light receiving surface side, and a metal, organic resin or roof tile is disposed on the non-light receiving surface side. Materials are arranged.

  Since the solar cell module using this weather-resistant film is very lightweight, the weight of the roof does not increase greatly even when applied to the roof. Moreover, the roof with a solar cell module is formed in substantially the same process as a normal roof except for wiring work of the solar cell module. Therefore, in the design of the building, there is no design change between the case where the solar cell module is mounted and the case where the solar cell module is not mounted, and the workability is excellent.

  Here, in order to take out the electric power generated by the solar cell element to the outside, an opening is provided in a part of the back surface reinforcing member disposed on the non-light-receiving surface, and the power extraction member connected to the terminal of the solar cell element is opened. Remove from the part. And the taken-out electric power extraction member is connected in the terminal box arrange | positioned so that an opening part may be covered.

When joining this back surface reinforcing member and a terminal box, there exists a method of using an adhesive and a pressure sensitive adhesive.
Further, there is a method of using an adhesive and a pressure-sensitive adhesive and placing a weight on the terminal box during a drying period until the adhesive and the pressure-sensitive adhesive function.

In addition, there is a method of mechanically joining without using an adhesive and a pressure-sensitive adhesive in order to facilitate the attachment work of the terminal box (see, for example, Patent Document 1).
In addition, a method of using an adhesive and a pressure-sensitive adhesive, and further spot welding a joining plate made of metal independent parts to a back reinforcing member, preparing a hole in a terminal box, and joining the joining plate and the hole (See, for example, Patent Document 2).
JP 2000-357812 A Japanese Patent Laid-Open No. 2004-247591

However, when only the adhesive and the pressure-sensitive adhesive are used, the bonding surface is displaced or floated before the end of the drying period until the adhesive and the pressure-sensitive adhesive function, so that the bonding strength is weak.
Further, when using a weight, the manufacturing work becomes complicated and a large manufacturing work place is required, so that the mass productivity is poor.

Moreover, in the technique disclosed by patent document 1, since it is mechanical joining, a clearance gap will be substantially formed between a back surface reinforcement member and a terminal box, and a water | moisture content permeate | occur | produces and an electric leakage generate | occur | produces.
Moreover, in the technique disclosed by patent document 2, since a joining board is added and a number of parts increases, cost increases.

  The present invention has been made in view of the above points, and has a strong bonding strength of the terminal box, an easy manufacturing operation, a gap on the bonding surface of the terminal box is hardly formed, and the number of components is reduced. The purpose is to provide modules.

  In the present invention, in order to solve the above problems, in a solar cell module having a solar cell element that converts light energy into electric energy, the back surface reinforcing member formed on the back surface side of the solar cell element and the back surface reinforcing member are formed. From the periphery of the opened portion, a part of the back surface reinforcing member has a back surface engaging portion formed to protrude to the back surface side of the solar cell element, a box engaging portion, and is arranged so as to cover the opening portion, There is provided a solar cell module comprising: a terminal box attached to a back surface reinforcing member by bonding a back surface engaging portion and a box engaging portion with an adhesive.

  According to such a solar cell module, first, the terminal box has a box engaging portion. The back reinforcing member is formed on the back side of the solar cell element. Thereafter, an opening is formed in the back reinforcing member. And a back surface engaging part is formed so that a part of back surface reinforcing member may protrude in the back surface side of a solar cell element from the circumference of an opening. Thereafter, the terminal box is disposed so as to cover the opening. And a terminal box is attached to a back surface reinforcement member by joining a back surface engaging part and a box engaging part with an adhesive agent.

  In the present invention, the back surface engaging portion is formed such that a part of the back surface reinforcing member protrudes to the back surface side of the solar cell element, and the terminal box is made to join the back surface engaging portion and the box engaging portion with an adhesive. It can be attached to the back reinforcing member.

If it does in this way, since a back surface engaging part and a box engaging part are always engaged and pressed down, a joint surface does not shift or float. Therefore, the bonding strength of the terminal box is increased.
Moreover, since the back surface engaging part and the box engaging part are always engaged and pressed down, the manufacturing operation is easy.

Further, since the back surface engaging portion and the box engaging portion are joined by the adhesive, it is difficult to form a gap on the joint surface between the back surface reinforcing member and the terminal box.
Moreover, since a part of back surface reinforcement member protrudes and forms in the back surface side of a solar cell element, a back surface engaging part reduces a number of parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the concept of the present invention will be described. FIG. 1 is a conceptual diagram of the present invention.
As shown in the figure, the solar cell module 10 includes a surface reinforcing member 11, a solar cell element 12, a power extraction member 12a, a back reinforcing member 13, a back engaging portion 13a, a terminal box 14, a box engaging portion 14a, and a fixing member. 14b, the cable 15, and the core wire 15a. The solar cell module 10 uses the terminal box 14 to electrically connect the solar cell element 12, the power extraction member 12a, the fixing member 14b, and the core wire 15a, so that the electric power generated by the solar cell element 12 is externally supplied. To supply. Note that the solar cell element 12 and the power extraction member 12a may be connected via a lead wire or the like without being directly connected.

  First, the terminal box 14 has a box engaging portion 14a and a fixing member 14b. Here, the fixing member 14 b provided in the terminal box 14 is a connection portion between the power extraction member 12 a connected to the terminal of the solar cell element 12 and the core wire 15 a of the external cable 15.

Further, the terminal box 14 has a hole for connecting the power extraction member 12 a connected to the terminal of the solar cell element 12 into the terminal box 14.
Further, the solar cell element 12 that converts light energy into electric energy is reinforced by the front surface reinforcing member 11 and the back surface reinforcing member 13. Specifically, the surface reinforcing member 11 is formed on the front surface side of the solar cell element 12, and the back surface reinforcing member 13 is formed on the back surface side of the solar cell element 12.

  Thereafter, an opening is formed in the back reinforcing member 13. And the back surface engaging part 13a is formed by bending a part of the back surface reinforcing member 13 from the periphery of the opening and projecting to the back surface side of the solar cell element 12. That is, in the process of forming one opening, the opening for taking out electric power and the back surface engaging portion 13a are simultaneously formed. And the terminal box 14 is arrange | positioned so that the connection part of the electric power extraction member 12a taken out from the opening part and the core wire 15a of the external cable 15 may be covered, and a connection part is protected. Moreover, the terminal box 14 is arrange | positioned so that an opening part may be covered, and an opening part is protected.

  Thereafter, the back surface engaging portion 13a is bent and the terminal box 14 is attached to the back surface reinforcing member 13 by bonding the back surface engaging portion 13a and the box engaging portion 14a with the adhesive 16.

If it does in this way, since the back surface engaging part 13a and the box engaging part 14a are always engaged and pressed down, a joint surface does not shift or float. Therefore, the bonding strength of the terminal box is increased.
Further, since the back surface engaging portion 13a and the box engaging portion 14a are always engaged and pressed, the weight is unnecessary, the manufacturing work is easy, and a wide manufacturing work place is not required. Therefore, the mass productivity of the solar cell module 10 is improved.

  Moreover, since the back surface engaging part 13a and the box engaging part 14a are joined by an adhesive agent, it is difficult to form a gap on the joint surface between the back surface reinforcing member 13 and the terminal box 14, and moisture does not enter. Therefore, no leakage occurs in the solar cell module 10.

  Moreover, since a part of back surface reinforcement member 13 protrudes in the back surface side of the solar cell element 12, the back surface engaging part 13a reduces a number of parts. Therefore, the cost is reduced in the solar cell module 10.

[First Embodiment]
Next, specific contents of the first embodiment of the present invention will be described. FIG. 2 is a structural diagram of the solar cell module viewed from the back side.

  As shown in the figure, the solar cell module 20 includes a terminal box 21, a lid 22, a fixing member 23, a fixing part 24, a cable 25, a core wire 26, an opening 27, a power extraction member 28, a box engaging part 29, and It is composed of a back surface engaging portion 30. The solar cell module 20 uses a terminal box 21 to electrically connect a solar cell element (not shown), a power extraction member 28, a fixing member 23, and a core wire 26, thereby generating electric power generated by the solar cell element. Is supplied to the outside. Note that the solar cell element and the power extraction member 28 may be connected via a lead wire or the like instead of being directly connected.

  First, the terminal box 21 has a box engaging portion 29 and a fixing member 23. Here, the fixing member 23 provided in the terminal box 21 is attached to the terminal box 21 by the fixing portion 24 and connected to the terminal of the solar cell element, and the core wire 26 of the external cable 25. It is a connection part. In this terminal box 21, in order to eliminate the influence of moisture from the electrical connection portion, a waterproof / insulating filling member (not shown) is filled after the connection between the core wire 26 and the power extraction member 28, Thereafter, the lid 22 is attached to the terminal box 21. The filling member is preferably flame retardant from the viewpoint of improving fire resistance.

Further, the terminal box 21 has a hole for connecting the power extraction member 28 connected to the terminal of the solar cell element into the terminal box 21.
Moreover, the solar cell element which converts light energy into electric energy is reinforced by a surface reinforcing member (not shown) and a back surface reinforcing member (not shown). Specifically, the surface reinforcing member is formed on the front surface side of the solar cell element, and the back surface reinforcing member is formed on the back surface side of the solar cell element.

  Thereafter, the opening 27 is formed in the back reinforcing member. And the back surface engaging part 30 is formed by bending a part of the back surface reinforcing member from the periphery of the opening 27 and projecting to the back surface side of the solar cell element. That is, in the process of forming one opening 27, the opening 27 for taking out electric power and the back surface engaging portion 30 are formed simultaneously. And the terminal box 21 is arrange | positioned so that the connection part of the electric power extraction member 28 taken out from the opening part 27 and the core wire 26 of the external cable 25 may be covered, and a connection part is protected. The terminal box 21 is disposed so as to cover the opening 27 and protects the opening 27. The opening member 27 is also filled with a filling member.

  Thereafter, the back surface engaging portion 30 is bent and the terminal box 21 is attached to the back surface reinforcing member by joining the back surface engaging portion 30 and the box engaging portion 29 with an adhesive (not shown).

Next, the A part shown in FIG. 2 is enlarged and the opening part 27 is demonstrated. FIG. 3 is a diagram showing an opening in the first embodiment.
Here, a part of the back surface reinforcing member 31 is cut in advance. For example, the back reinforcing member 31 has a thickness of 0.8 mm, and the metal plate is a galvalume plate. The back reinforcing member 31 is attached to a solar cell element (not shown) by EVA or the like.

  Thereafter, the back surface engaging portion 30 is formed by bending the cut portion and causing it to be bent. Moreover, the opening part 27 exposes the solar cell element when the back surface engaging part 30 is caused. It should be noted that ETFT (ethylene tetrafluoroethylene copolymer) or the like is previously applied to a part of the back reinforcing member 31 that will later become the back engaging portion 30 in order to peel off the corresponding back reinforcing member 31 from EVA or the like. Lamination is performed and the ETFT and the like are removed after the back surface engaging portion 30 is raised.

Next, the A part shown in FIG. 2 will be enlarged and described in detail. FIG. 4 is an enlarged view of a portion A in FIG. 2 in the first embodiment.
Here, the solar cell element (not shown) exposed from the opening 27 is connected to the power extraction member 28. Then, an adhesive (not shown) is applied to the terminal box 21 having the box engaging portion 29. And the terminal box 21 is arrange | positioned so that the opening part 27 may be covered. The terminal box 21 is attached to the back surface reinforcing member 31 by bending the back surface engaging part 30 and joining the back surface engaging part 30 and the box engaging part 29 with an adhesive.

If it does in this way, since the back surface engaging part 30 and the box engaging part 29 are always engaged and pressed, a joint surface does not shift | deviate or float. Therefore, the bonding strength of the terminal box is increased.
Moreover, since the back surface engaging part 30 and the box engaging part 29 are always engaged and pressed, a weight is unnecessary, manufacturing work is easy, and a wide manufacturing work place is unnecessary. Therefore, the mass productivity of the solar cell module 20 is improved.

  Moreover, since the back surface engaging part 30 and the box engaging part 29 are joined with an adhesive agent, it is hard to make a clearance gap in the joint surface between the back surface reinforcing member 31 and the terminal box 21, and moisture does not enter. Therefore, no leakage occurs in the solar cell module 20.

  Moreover, since the back surface engaging part 30 is formed so that a part of the back surface reinforcing member 31 protrudes to the back surface side of the solar cell element, the number of parts is reduced. Therefore, the cost is reduced in the solar cell module 20.

Further, when a fire is generated on the surface side of the solar cell module 20, there is only one opening 27 for one terminal box, so that it is difficult to spread to the back side of the solar cell module 20.
Moreover, since the back surface engaging part 30 exists in the back surface reinforcing member 31, the position of the terminal box 21 can be easily determined.

Moreover, since the back surface engaging part 30 and the box engaging part 29 are joined, even if the adhesive surface area of the back surface reinforcement member 31 and the terminal box 21 is small, required adhesive force can be obtained.
[Second Embodiment]
Next, the portion A shown in FIG. 2 when the other box engaging portion 29a is used instead of the box engaging portion 29 used in the first embodiment will be enlarged and the opening 27 will be described. To do. FIG. 5 is a diagram showing an opening in the second embodiment.

  Here, a part of the back surface reinforcing member 31 includes a power extraction member opening 27a in advance. And the solar cell element (not shown) exposed from the opening part 27a for electric power extraction members is connected with the electric power extraction member (not shown).

  Thereafter, the periphery of the power extraction member opening 27a of the back reinforcing member 31 is cut. For example, the back reinforcing member 31 has a thickness of 0.8 mm, and the metal plate is a galvalume plate. The back reinforcing member 31 is attached to the solar cell element by EVA or the like.

  Then, the back surface engaging part 30a is formed by bending the cut part and causing it. Moreover, the opening part 27 exposes the solar cell element when the back surface engaging part 30a is caused. In addition, in order to peel off the corresponding back surface reinforcing member 31 from EVA or the like, ETFT or the like is laminated in advance on a part of the back surface reinforcing member 31 to be the back surface engaging portion 30a later, and the back surface engaging portion 30a is caused. After that, ETFT and the like are removed.

  Next, the A portion shown in FIG. 2 when the other box engaging portion 29a is used instead of the box engaging portion 29 used in the first embodiment will be described in detail. FIG. 6 is an enlarged view of part A of FIG. 2 in the second embodiment.

  Here, an adhesive (not shown) is applied to the terminal box 21a having the box engaging portion 29a. And the terminal box 21a is arrange | positioned so that the opening part 27 may be covered. The terminal box 21a is attached to the back surface reinforcing member 31 by bending the back surface engaging part 30a and joining the back surface engaging part 30a and the box engaging part 29a with an adhesive.

If it does in this way, since the back surface engaging part 30a and the box engaging part 29a are always engaged and pressed down, a joint surface does not shift or float. Therefore, the bonding strength of the terminal box is increased.
Further, since the back surface engaging portion 30a and the box engaging portion 29a are always engaged and pressed, the weight is unnecessary, the manufacturing work is easy, and a wide manufacturing work place is not required. Therefore, the mass productivity of the solar cell module 20 is improved.

  Moreover, since the back surface engaging part 30a and the box engaging part 29a are joined by an adhesive agent, it is difficult to form a gap on the joint surface between the back surface reinforcing member 31 and the terminal box 21a, and moisture does not enter. Therefore, no leakage occurs in the solar cell module 20.

  Moreover, since the back surface engaging member 30a is formed so that a part of the back surface reinforcing member 31 protrudes toward the back surface side of the solar cell element, the number of parts is reduced. Therefore, the cost is reduced in the solar cell module 20.

Further, when a fire is generated on the surface side of the solar cell module 20, there is only one opening 27 for one terminal box, so that it is difficult to spread to the back side of the solar cell module 20.
Moreover, since the back surface engaging part 30a exists in the back surface reinforcing member 31, it is easy to determine the position of the terminal box 21a.

Moreover, since the back surface engaging part 30a and the box engaging part 29a are joined, even if the adhesive area of the back surface reinforcement member 31 and the terminal box 21a is small, required adhesive force can be obtained.
Moreover, since a part of the back surface reinforcing member 31 includes the power extraction member opening 27a in advance, the power extraction member 28 can be connected to the solar cell element before the back surface engagement portion 30a is formed.

It is a conceptual diagram of this invention. It is a structure figure of the solar cell module seen from the back side. It is a figure which shows the opening part in 1st Embodiment. It is an enlarged view of the A section of FIG. 2 in 1st Embodiment. It is a figure which shows the opening part in 2nd Embodiment. It is an enlarged view of the A section of FIG. 2 in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Solar cell module 11 Surface reinforcement member 12 Solar cell element 12a Power extraction member 13 Back surface reinforcement member 13a Back surface engaging part 14 Terminal box 14a Box engaging part 14b Fixing member 15 Cable 15a Core wire

Claims (6)

In a solar cell module having a solar cell element that converts light energy into electrical energy,
A back reinforcing member formed on the back side of the solar cell element;
From the periphery of the opening formed in the back surface reinforcing member, a back surface engaging portion formed by protruding a part of the back surface reinforcing member to the back surface side of the solar cell element;
A terminal box that has a box engaging portion, is arranged so as to cover the opening, and is attached to the back reinforcing member by bonding the back engaging portion and the box engaging portion with an adhesive;
A solar cell module comprising:   The solar cell module according to claim 1, wherein the back reinforcing member is a metal plate.   The solar cell module according to claim 2, wherein the back surface engaging portion is formed by bending a part of the back surface reinforcing member.   3. The terminal box is attached to the back surface reinforcing member by bending the back surface engaging portion and joining the back surface engaging portion and the box engaging portion with an adhesive. The solar cell module described.   The back surface engaging portion is formed by a part of the back surface reinforcing member being cut and raised, and the opening portion exposes the solar cell element by the back surface engaging portion being raised. The solar cell module according to claim 1. 2. The solar cell module according to claim 1, wherein only one opening exists for one terminal box.

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