JP2013117155A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module capable of absorbing an expansion amount by weather.SOLUTION: The number of junction points between a solar cell panel unit 2 and a frame unit 3 consisting of one or plural rigid bodies in a prescribed peripheral region, per rigid body in one side of the rectangle of the solar cell panel unit 2, is one or less in a flat plate part 2b of the solar cell panel unit 2, and one or less in the opposite part of the solar cell panel unit 2.

Description

  The present invention relates to a solar cell module capable of converting light energy into electric energy.

  In recent years, technologies related to solar cells have attracted attention as one of the means for solving global environmental problems. For this reason, solar cell modules are widely installed from houses to industrial facilities.

  Since solar cells use solar energy, solar cell modules are generally installed outdoors. Therefore, it is designed so that no damage or the like occurs when thermal expansion occurs due to changes in temperature or the like.

  For example, in the solar cell module described in Patent Document 1, the fixing member that supports the panel has an elastic structure, and even when the panel expands due to heat, the expansion is absorbed by the bending of the fixing member. It is unlikely to get damaged.

  Moreover, the solar cell module described in Patent Document 2 covers the periphery of the panel with a frame frame. By providing an appropriate gap in the frame frame, the gap absorbs the expansion.

JP 2010-261180 A JP 2007-180314 A

  However, in recent years, the provisions for subsidies for housing solar power generation introduction support measures have been reviewed. Accordingly, a business operator who receives assistance has to undergo a predetermined certification test, and a solar cell module that satisfies a certification standard that has not existed before is required.

  Specifically, it must pass a flame propagation test defined in Japanese Industrial Standard (JIS C 8992-2) or IEC 61730-2. These tests are prescribed to expose the fire type directly to the solar cell module. Further, as a result of the test, it is stipulated that there should be no phenomenon in which a burning or red-hot fire is blown off from the specimen or dropped onto the specimen.

  Here, when a test is performed using a conventional solar cell module, breakage can be confirmed at a location where a fire type hits. The reason is considered to be that when the solar cell module is heated during the test, a part of the frame portion is greatly bent. That is, the conventional solar cell module is an integral member that increases the rigidity, or is screwed even if it is divided. On the other hand, in the fire propagation test, since the fire type is directly applied to the solar cell module, the temperature is high in the part where the fire type hits, and the temperature is low in the part where it does not hit.

  If a fire propagation test is performed in such a situation, the portion of the frame that is exposed to the fire type tends to expand, while the portion that does not receive the fire type does not expand so much. However, since the frame has a certain rigidity, for example, when a fire hits one side of the frame shape, the portion is deformed into a bow shape.

  Therefore, although the conventional technology is designed to absorb the expansion amount due to the weather, the solar cell module will be damaged if the deformation exceeds the expansion amount. In addition, even when designed to produce a clearance that is greater than the amount of expansion due to the weather, there is a limit to the amount that can be absorbed by the conventional method. It cannot be said that it can always cope.

  By the way, the solar cell panel has a structure in which two types of semiconductors having different properties are stacked to generate electric energy, and glass is laminated on the upper and lower sides to protect the solar cell. In addition, a sealing resin is filled between the solar battery cell and the glass in order to seal the solar battery cell. As the sealing resin, for example, ethylene vinyl acetate copolymer resin (EVA) is used. Further, a frame frame is provided on the periphery of the solar cell panel to prevent leakage of the sealing resin from the end face. As described above, the solar cell panel must be considered not only to prevent damage due to thermal expansion as described above but also to prevent the sealing resin from leaking from the end face of the solar panel.

  Furthermore, the solar cell panel needs to have a predetermined strength. This is because the international standard IEC standard (IEC61215) stipulates that there is no damage even when a load of 2400 [Pa] is applied to the front and back as a mechanical test of the solar cell.

  In view of the above circumstances, a main object of the present invention is to provide a solar cell module that is not damaged even when a change in general air temperature or more occurs.

  A solar cell module according to claim 1 of the present invention has a solar cell element inside, a rectangular solar cell having a planar flat plate portion, a facing portion facing the flat plate portion, and an end face located at the periphery thereof. A panel unit, a rigid body having a linear expansion coefficient different from that of the brittle base material constituting the flat plate portion, and one or a plurality of frame units that support the solar cell panel unit; the solar cell panel unit; It is a solar cell module provided with the junction part which joins a frame unit, Comprising: The number of the said junction parts located in the peripheral area | region including the said end surface is the said flat plate per said rigid body per rectangular side of the said solar cell panel unit. It is characterized in that there are no more than one place in the part and no more than one place in the facing part.

  As described above, the solar cell panel unit and the frame unit are limited in the number of joints at a predetermined joint location, so that they are not damaged due to internal stress caused by thermal expansion.

  Moreover, the solar cell module concerning Claim 2 is a solar cell module of Claim 1, Comprising: The said solar cell panel unit is comprised by the laminated structure which pinched | interposed the said solar cell element with the said brittle base material, Further, the space between the flat plate portion and the facing portion is filled with a sealing agent for sealing the solar cell element, and further includes a cover portion for protecting the end face.

  Moreover, the solar cell module concerning Claim 3 is a solar cell module of Claim 2, Comprising: A space | gap exists in the cover part adjacent in the corner | angular part of the said solar cell panel unit, and it fits with the said cover part. It has a corner member that can be combined.

  Moreover, the solar cell module concerning Claim 4 is a solar cell module of Claim 2 or 3, Comprising: The flame-retardant buffer material exists between the said cover part and the said end surface, It is characterized by the above-mentioned. To do.

  Moreover, the solar cell module concerning Claim 5 is a solar cell module in any one of Claims 1-4, Comprising: The said frame unit is the said solar cell panel from the reverse direction of the light-receiving surface of the said solar cell element. It is characterized by supporting the unit.

  Moreover, the solar cell module concerning Claim 6 is a solar cell module of Claim 1, Comprising: The said solar cell panel unit is comprised by the laminated structure which pinched | interposed the said solar cell element with the said brittle base material, The space between the flat plate portion and the facing portion is filled with a sealing agent for sealing the solar cell element, and the frame unit has an outer shape substantially the same as the solar cell panel unit, A first frame portion located on the flat plate portion side of the solar cell panel unit, and a second frame portion whose outer shape is substantially the same as that of the solar cell panel unit and located on the facing portion side of the solar cell panel unit. The end face is protected by using a flame retardant adhesive tape that includes the plurality of rigid bodies and crosslinks the first frame portion and the second frame portion.

  As described above, according to the present invention, even when the amount of expansion due to the weather is exceeded, no stress is generated in the solar cell module. However, parts and the like are not damaged. Further, it is possible to prevent leakage of the sealing resin from the solar cell panel. Furthermore, even if a predetermined load is applied to the panel, it will not be damaged.

It is a bottom view of the solar cell module concerning this invention. It is AA sectional drawing of the solar cell module concerning this invention. It is a top view of another example of the solar cell module according to the present invention. It is CC sectional drawing of another Example of this solar cell module of this invention. It is another Example of the frame unit concerning this invention. It is another Example of the frame unit concerning this invention. It is another Example of the frame unit concerning this invention. It is another Example of the frame unit concerning this invention.

FIG. 1 is a bottom view of the solar cell module 1, and FIG. 2 is a cross-sectional view taken along line AA in FIG. A solar cell module 1 according to the present invention will be described with reference to FIGS. 1 and 2. Unless otherwise specified, the horizontal direction in FIG. 1 is referred to as an X direction in which the arrow direction in the figure is positive, and the vertical direction is referred to as a Y direction in which the arrow direction in the figure is positive. Further, the vertical direction in FIG. 2 is referred to as a Z direction in which the arrow direction in the figure is positive. Also, the positive direction of the Z direction is expressed as the upper side, and the opposite direction is expressed as the lower side.

  The solar cell module 1 includes a rectangular solar cell panel unit 2 having a flat upper surface and a frame unit 3 that supports the solar cell panel unit 2. In addition, the solar cell panel unit 2 and the frame unit 3 are joined by a joining portion 4. This solar cell panel unit 2 is approximately a rectangular parallelepiped of 2 m in the X direction, 1 m in the Y direction and 0.1 m in the Z direction, and a flat plate portion 2 b which is a flat plate on the upper side in the Z direction and a facing portion at a position facing this. 2d and the end surface 2a are provided in the periphery. Thus, since the solar cell panel unit 2 has a flat surface, it is possible to receive a large amount of sunlight incident from the flat plate portion 2b side, that is, from the upper side in the Z direction.

  Moreover, the attachment unit 5 is provided so that the solar cell module 1 concerning this invention can be suitably attached to the roof of a house, or an industrial facility. The mounting unit 5 holds the periphery of the rectangular solar cell panel unit 2. The details of the mounting unit 5 will be described later.

  Next, the solar cell panel unit 2 will be described. Inside, a plurality of solar cell elements 6 called cells are provided, and sunlight received from the light receiving surface 6a side is converted into electric energy. Specifically, it has a structure in which a p-type semiconductor and an n-type semiconductor are joined, and is composed of a pn-junction photodiode. The received light energy is absorbed by electrons, and the energetic electrons are directly absorbed. It has been taken out. The extracted electrical energy is collected in a terminal box (not shown) and output through an output cable. In this embodiment, twelve solar cell elements 6 are used, but the present invention is not particularly limited thereto.

  Of course, the solar cell module 1 according to the present invention is often installed outdoors, and therefore, it may be exposed to wind and rain, and dust and sand may fly. Therefore, for the purpose of protecting the solar cell element 6, it is sandwiched by cover glass 7 corresponding to a brittle substrate from the upper and lower sides in the Z direction. And the cover glass 7 comprises the flat plate part 2b and the opposing part 2d of the solar cell panel unit 2. FIG. In other words, it has a laminated structure of the solar cell element 6 and the cover glass 7. In addition, in the present Example, although the solar cell element 6 is inserted | pinched from the up-and-down side using the cover glass 7, it does not limit to this. That is, the upper side may be made of a highly transmissive glass so that a large amount of light can be supplied to the solar cell element 6, and the lower side may be made of a film such as a laminate sheet capable of preventing at least dust and sand. .

  As described above, the cover glass 7 constituting the flat plate portion 2b and the facing portion 2d of the solar cell panel unit 2 is a thin plate, and its thickness is 3 mm so that it can withstand installation outdoors. However, the present invention is not limited to this, and a thin cover glass that has been put into practical use in recent years may be used. The cover glass 7 is a satin-patterned template glass with an uneven surface. The reason for having the unevenness is to provide a light scattering function so that the surroundings are not dazzled even when installed outdoors. Therefore, the cover glass 7 on the facing portion 2d side that does not require the light scattering function does not necessarily have a satin pattern.

  As described above, the solar cell element 6 is sandwiched between the upper and lower cover glasses 7, and the gap 8 is filled with the sealant 8. As time passes, dust and sand are prevented from entering the solar cell panel unit 2 and damaging the solar cell element 6. In this embodiment, ethylene vinyl acetate copolymer resin (EVA) is used as the sealant 8 in consideration of durability, but other sealants having the same function can also be used.

  Next, the frame unit 3 will be described. The frame unit 3 is made of aluminum so that it is lightweight and has a certain rigidity. However, it is not necessary to limit to aluminum. Moreover, it is a cross-shaped shape with the thickness of one side of 5 mm, and the plane of the facing portion 2d of the solar cell panel unit 2 is supported using the cross surface. Since the support is made in the direction opposite to the light receiving surface 6a of the solar cell element 6, that is, from the lower side in the Z direction, even if it receives a predetermined stress from the upper side, it is made of a brittle material. A certain glass does not bend and break. In this embodiment, the frame unit 3 has a cross shape, but is not limited to this as described in other embodiments described later. Those skilled in the art will understand that it is only necessary to support the plane of the facing portion 2d.

  As mentioned many times, solar cells that are often installed outdoors are affected by changes in temperature. This change is received similarly to the conventional solar cell even in the solar cell module 1 according to the present invention. The change is that the linear expansion coefficient of the frame unit 3 made of aluminum is about 23.6 [× 10 −6 / ° C.], whereas the cover glass 7 constituting the solar cell panel unit 2 is about 8.5 [× 10 Unlike the case of −6 / ° C., if the air temperature rises, the frame unit 3 will expand more than glass. By the way, the solar cell module 1 according to the present invention not only supports the solar cell panel 2 by the frame unit 3 but also the double-sided tape 9 at the joint 4 over the entire surface where the frame unit 3 supports the solar cell panel unit 2. Are joined together. The reason why the double-sided tape 9 is used is that the base material of the double-sided tape 9 is generally distorted even if shear stress is generated on the solar cell panel unit 2 due to the expansion of the frame unit 5. This is because the stress applied to the solar cell panel unit 2 is reduced as compared with the case where it is fixed using screws or an adhesive. Therefore, it is preferable that the thickness of the base material is thick so that the allowable value of the strain amount increases. In this embodiment, the thickness of the double-sided tape 9 including the base material is 2 mm. The adhesive used for the double-sided tape 9 is not particularly limited, and can be used in consideration of durability and adhesiveness.

  Returning to the description, the joining of the solar cell panel unit 2 and the frame unit 3 will be described in detail. As described above, the entire surface of the frame unit 3 supporting the solar cell panel unit 2 is joined by the double-sided tape 9. Further, the frame unit 3 is physically composed of one rigid body, and has a cross-shaped cross shape as a support surface. Therefore, in the peripheral region 2c of the solar cell panel unit 2, the joint 4 between the solar cell panel unit 2 and the frame unit 3 is present in the flat plate portion 2b per one side of the rectangular solar cell panel unit 2. do not do. On the other hand, there is one location in the facing portion 2d. As described above, since there are not two or more joint portions 4 at a predetermined location, even if the solar cell module 1 is expanded by heat, the frame unit 2 that is superior in strength is greatly expanded. Restraining the panel unit 2 does not lead to breakage of the cover glass 7 and other parts of the solar cell panel unit 2. On the other hand, if there are two joint portions, when expansion due to heat occurs, the frame unit 3 having a large expansion amount applies stress to the solar cell panel unit 2, and the solar cell panel unit 2 may be damaged. . In this embodiment, since the solar cell panel unit has a rectangular shape with four sides, the solar cell panel unit has a total of four joint portions 4, one on each side. However, it is not always necessary for the joint portion 4 to be provided on each side. If the joint portion 4 is present, even if a load is applied from the lower side in the Z direction to the vicinity of the periphery of the solar cell panel unit 2, the frame unit 3 is less bent and can be prevented from being damaged. Further, the frame unit 3 does not need to be physically one rigid body. Although details will be described later, a plurality of rigid bodies may be physically used as shown in FIGS. 5c and 5d.

  Here, the peripheral region 2c refers to a region of the peripheral surface of the end surface 2a of the solar cell panel unit 2 and the flat plate portion 2b or the facing portion 2d. Moreover, a peripheral part means the area | region about 100 mm (B of FIG. 1) from the end surface 2a of the solar cell panel unit 2. FIG. By the way, as is well known, glass often breaks starting from a minute crack at the edge. In detail, there are many small cracks that occur during cutting or transportation at the edge of the glass. When stress is applied to such glass, stress concentration occurs in the small cracks. It will be damaged. The solar cell panel unit 2 according to the present invention limits the number of the joint portions 4 in the peripheral region 2c, so that even if thermal expansion occurs, the stress concentration that causes breakage is reduced at the edge of the glass. It has a structure that does not easily cause cracks. Therefore, damage to the solar cell panel unit 2 can be suitably prevented. In the present embodiment, the frame unit 3 supports and joins the solar cell panel unit 2 with the cross surface of the cross portion, that is, the rectangular shape of the solar cell panel unit 2 even in a region other than the peripheral region 2c. There are no more than one joint 4 per side per single stiffness. With this configuration, stress concentration is not further applied to the edge of the glass. However, from the viewpoint of the strength of the solar cell module 1, a plurality of joint portions 4 may be provided per single rigidity per side of the solar cell panel unit 2 except for the peripheral region 2 c.

  Next, the attachment unit 5 will be described. The attachment unit 5 is located on the outer frame of the solar cell panel unit 2. In the present embodiment, there are a total of four attachment units 5 on each side of the solar cell panel unit 2. The mounting unit 5 is made of aluminum in terms of weight reduction, cost and strength. Moreover, although not shown in figure, the attachment unit 5 is provided with the hole for installation in a suitable place. When installing outdoors, use the holes for installation. The reason why the installation hole is provided in the attachment unit 5 is to improve versatility. In detail, when a solar cell is attached to the roof, a gantry (not shown) is fixed to the roof, while the solar cell module is generally attached to the gantry. Thus, if the positions of the conventional product and the installation hole are matched, it is economical because a new solar cell module can be attached using a conventional frame even in the case of replacement. However, the present invention is not limited to this, and an installation hole may be provided in the frame unit 3, for example. In this case, the mounting unit 5 can be designed to be compact.

  Further, the attachment unit 5 includes a U-shaped cover portion 5a. And the end surface 2a of the solar panel unit 2 is inserted in a U-shaped part. Thus, the end surface 2a is protected by hiding the end surface 2a. The reason why the protection is necessary is that, as described above, the solar cell panel unit 2 has a laminated structure of the cover glass 7 and the solar cell element 6 and is filled with the sealant 8 that seals the solar cell element 6. Structure. Therefore, the strength of the end face 2a is not necessarily strong.

  Moreover, even if the buffer material 10 exists between the solar cell panel unit 2 and the cover portion 5a and the solar cell panel unit 2 expands due to heat, excessive stress is prevented from being applied to the end portion. doing. Moreover, the buffer material 10 exists over the entire inner surface of the cono-shape. For example, even when the solar cell module 1 is vibrated for some reason, the cover glass 7 and the cover portion 5a come into contact with each other and the cover glass 7 Is prevented from being damaged.

  Here, the cushioning material 10 may be rubber or other elastic material, and the type of the cushioning material 10 is not particularly limited, but a cushioning material having weather resistance and flame retardancy is desirable. This is because weather resistance is often installed outdoors and cannot be easily replaced. Moreover, the flame retardancy is because the solar cell module which passed the spark test etc. is calculated | required as the detail mentioned above. Further, the buffer material 10 is required to have insulating properties. This is because it is necessary to prevent leakage of electric energy generated in the solar cell element 6. From this point of view, in this embodiment, glass wool having a non-combustible material, a refractory material, and a thermal expansion refractory material is used as the buffer material 10. A part or all of them may be rock wool, ceramic fiber, or Teflon (registered trademark) spacer. Also in this case, it is possible to suitably prevent the cover glass 7 from being damaged due to contact between the cover portion 5a and the cover glass 7.

  Here, “flame retardant” means that the buffer material burns even when it is exposed to the flame of a gas burner for 5 minutes to meet the test standard of the certification test for confirming the safety qualification of the solar cell module. The characteristic that does not fall from the solar cell module in the state. Specifically, a cushioning material that does not burn even at an operating temperature of 700 ° C. or higher is desirable, further 800 ° C. or higher, more preferably 1000 ° C. or higher.

  By the way, even if the cover portion 5a and the gap 13 are present at both ends of the cover portion 5a covering the end portion of the rectangular solar cell panel unit 2, the cover portion 5a expands due to heat, Have a certain gap so that there is no deformation. Further, since the corner member 11 is provided at the corner portion to cover the gap 13, even if there is a gap between the adjacent cover portions 5 a, the internal solar cell panel unit 2 is not exposed. Absent. In particular, it is effective in that the end face 2a can be covered and concealed to protect the end face.

  The corner member 11 is composed of one corner member main body 11a made of aluminum and four cushion materials 11b having elasticity. In this way, the corner member 11 is fitted and fixed to the cover member 5a using the elasticity of the cushion material 11b. Here, attention must be paid to the fitting condition. In other words, if the fitting condition is weak, the corner member 11 is easily detached, while if the fitting condition is strong, there are a plurality of constraining places per rectangular side of the solar cell panel unit 2 as a result. Because it will be. In this case, the cover member 5a having a large coefficient of thermal expansion is bent, resulting in a stress being applied to the solar cell panel unit 2, and a situation in which the effect of the present invention cannot be achieved may occur. Considering this point, the cushion material 11b must be selected and the fitting condition must be determined. In this embodiment, an elastic member having a diameter of 20 mm and a thickness of about 3 mm is used for the cushion material 11b. Further, when the corner member 11 is attached, the cushion material 11b is pressed to 2 mm, and the corner member 11 is attached using its elastic force. In FIG. 1, only two cushion members 11b are shown, but two cushion members 11b are also provided on the back side of the cover member 5a. The corner member main body 11a does not need to be made of aluminum, and may be made of resin.

  In this embodiment, the frame unit 3 and the mounting unit 5 are not coupled, but may be fixed using screws. Even if it is fixed using screws, the solar cell panel unit 2 will not be damaged by receiving stress from the mounting unit 5 due to thermal expansion.

  As described above, if the solar cell module 1 according to the present invention is used, damage due to thermal expansion that cannot be achieved by the conventional technology can be prevented, and the end surface portion of the solar cell panel unit 2 that is weak in strength can be appropriately formed. Can be protected. Further, even if a constant load is applied to the flat plate portion 2b and the facing portion 2d from the outside, they are not damaged.

(Other embodiments according to the present invention)
Next, other embodiment is demonstrated about the solar cell module 1 of this invention using FIG. 3 and FIG. 3 is a top view, and FIG. 4 is a cross-sectional view taken along the line CC. In addition, the same code | symbol is attached | subjected when it is the same as FIG.1 and FIG.2, and the description is abbreviate | omitted. In the description, the horizontal direction in FIG. 3 is referred to as an X direction in which the arrow direction in the figure is positive, and the vertical direction is referred to as a Y direction in which the arrow direction in the figure is positive. Also, the vertical direction in FIG. 4 is referred to as a Z direction with the arrow direction in the figure being positive. Also, the positive direction of the Z direction is expressed as the upper side, and the opposite direction is expressed as the lower side.

  The solar cell panel unit 2 is the same as the solar cell panel unit 2 described in the above embodiment.

  On the other hand, the frame unit 3 includes a first frame portion 3a on the upper side of the flat plate portion 2b of the solar cell panel unit 2 and a second frame portion 3b on the lower side of the facing portion 2d. Thus, the solar cell panel unit 2 is supported by the two rigid bodies of the first frame portion 3a and the second frame portion 3b.

Both the first frame part 3 a and the second frame part 3 b have substantially the same outer shape as the solar cell panel unit 2. However, for example, the frame shape may be larger by 1 mm in the X and Y directions. Moreover, although the thickness of a frame is 5 mm, it can be suitably changed from a viewpoint of strength or weight. Further, in this embodiment, there is no member constituting the frame inside the frame, but a cross-shaped reinforcement can be appropriately performed as in the other embodiments.

  The first frame portion 3 a and the second frame portion 3 b are both made of aluminum and are different from the material of the cover glass 7 of the solar cell panel unit 2.

  Here, the solar cell panel unit 2 and the first frame portion 3 a are joined by the joint portion 4 using the double-sided tape 9. Here, the reason why the double-sided tape 9 is used is that it is advantageous for damage to parts compared to the case where the double-sided tape 9 is fixed with an adhesive or a screw for the reason described above. That is, the stress applied to the solar cell panel unit 2 can be relieved even if the base material of the double-sided tape is bent by a predetermined amount even if expansion due to heat occurs.

  The solar cell panel unit 2 and the first frame portion 3a are joined together by a rectangular joining portion 4 having a long side of 100 mm and a short side of 5 mm. The joint 4 is a peripheral region 2c including the end surface 2a of the solar cell panel unit 2 and is present in the flat plate portion 2d, and a single rigid body per rectangular side of the solar cell panel unit 2 There is one location per first frame portion 3a. With such a configuration, even if the first frame portion 3a having a high thermal expansion coefficient is expanded due to heat expansion, the stress is not applied to the solar cell panel unit 2. The peripheral region 2c is as described above.

  On the other hand, the solar cell panel unit 2 and the second frame part 3b are also joined by the joint part 4 having the same shape. Although this joining part 4 is different from the previous point in that it exists not in the flat plate part 2b but in the opposing part 2d, it is joined per second frame part 3b, which is a single rigid body per rectangular side of the solar cell panel unit 2. The part 4 is one place. Therefore, it goes without saying that the effect of the present invention is achieved. In addition, the second frame portion 3b has an installation hole 3d for use in installing the solar cell module 1 on a roof or the like, but the rest is the same as the first frame portion 3a, and the details are omitted. .

  The outer frame of the frame unit 3 is surrounded by an adhesive tape 12, and the adhesive tape 12 bridges the gap between the first frame portion 3a and the second frame portion 3b. Thereby, the periphery of the solar cell panel unit 2 is protected.

  Here, it is desirable that the adhesive tape 12 is flame retardant, that is, a tape using a special flame retardant base material. For example, a glass cloth flame retardant tape or a PTFE seal tape can be used. In this embodiment, a glass cloth flame retardant tape is used. In addition, as described above, flame retardancy means that the cushioning material is used even if it is exposed to the flame of a gas burner for 5 minutes so that it conforms to the test standard of the certification test for confirming the safety eligibility of the solar cell module. The characteristic that does not fall from the solar cell module in a burning state.

(Other embodiments according to the present invention)
5a and 5b show still another embodiment of the solar cell module 1 according to the present invention, in which only the frame unit 3 is shown, and the frame unit 3 is formed of a single rigid body. These frame units 3 support a solar cell panel unit 2 having a long side and a short side having substantially the same size from the upper side of the figure, and are bonded using a double-sided tape on the entire support surface. Also in the present embodiment, the number of joints (hatted portions in the figure) located in the peripheral region 2c is less than a predetermined number per single rigid body per rectangular side of the solar cell panel unit 2. The effects of the invention can be achieved.

  5c and 5d show still another embodiment of the solar cell module 1 according to the present invention. Each figure shows only the frame unit 3, and the frame unit 3 is composed of a plurality of rigid bodies. Specifically, the frame unit 3 in FIG. 5c is composed of two T-shaped rigid bodies, and the frame unit 3 in FIG. 5d is composed of four plate-shaped rigid bodies. These frame units 3 support a solar cell panel unit 2 having a long side and a short side having substantially the same size from the upper side of the figure, and are bonded using a double-sided tape on the entire support surface. Also in the present embodiment, the number of joints (hatted portions in the figure) located in the peripheral region 2c is less than a predetermined number per single rigid body per rectangular side of the solar cell panel unit 2. The effects of the invention can be achieved. In the present embodiment, there may be two joints located in the peripheral region 2 c per rectangular side of the solar cell panel unit 2. However, since it is joined to a physically separated rigid body, the effects of the present invention can be achieved. This is because even when the frame unit 3 expands due to heat, no stress is applied to the solar cell panel unit 2 in an attempt to increase the distance between the joints in accordance with the expansion.

  Although the present invention has been described with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes are possible without departing from the scope of the present invention. It is.

In the solar cell module according to the present invention, it is possible to prevent the deformation and detachment of components due to thermal expansion / contraction.

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Solar cell panel unit 2a End surface 2b Flat plate part 2c Peripheral area | region 2d Opposing part 3 Frame unit 3a 1st frame part 3b 2nd frame part 3d Installation hole 4 Junction part 5 Attachment unit 5a Cover part 6 Solar cell element 6a Light-receiving surface 7 Cover glass 8 Sealant 9 Double-sided tape 10 Buffer material 11 Corner member 11a Corner member body 11b Cushion material 12 Adhesive tape 13 Gap

Claims (6)

A rectangular solar cell panel unit having a solar cell element inside, a planar flat plate portion, a facing portion facing the flat plate portion, and an end face located at the periphery thereof,
A linear body having a linear expansion coefficient that is different from the brittle base material constituting the flat plate portion, and a frame unit composed of one or more supporting the solar cell panel unit;
A solar cell module comprising a joint for joining the solar cell panel unit and the frame unit,
The number of the joint portions located in the peripheral region including the end face is one or less in the flat plate portion and one place in the facing portion per rigid body per one side of the rectangular shape of the solar cell panel unit. A solar cell module characterized by the following. The solar cell module according to claim 1,
The solar cell panel unit is configured by a laminated structure in which the solar cell element is sandwiched between the brittle substrates, and a sealing agent for sealing the solar cell element is filled between the flat plate portion and the facing portion. Has been
Furthermore, it has a cover part which protects the said end surface, The solar cell module characterized by the above-mentioned. The solar cell module according to claim 2, wherein
A solar cell module characterized in that a gap exists in a cover portion adjacent to the corner portion of the solar cell panel unit and has a corner member that can be fitted to the cover portion. The solar cell module according to claim 2 or 3,
A solar cell module, wherein a flame-retardant cushioning material exists between the cover portion and the end surface. It is a solar cell module in any one of Claims 1-4, Comprising:
The said frame unit supports the said solar cell panel unit from the reverse direction of the light-receiving surface of the said solar cell element, The solar cell module characterized by the above-mentioned. The solar cell module according to claim 1,
The solar cell panel unit is configured by a laminated structure in which the solar cell element is sandwiched between the brittle substrates, and a sealing agent for sealing the solar cell element is filled between the flat plate portion and the facing portion. Has been
The frame unit has an outer shape substantially the same shape as the solar cell panel unit, and a first frame portion located on the flat plate portion side of the solar cell panel unit, and an outer shape is substantially the same shape as the solar cell panel unit. And comprising the plurality of rigid bodies of the second frame portion located on the facing portion side of the solar cell panel unit,
The solar cell module, wherein the end face is protected by using a flame-retardant adhesive tape that bridges the first frame part and the second frame part.

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