JP2014207362A - Solar battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery which inhibits damages of a light transmission plate member while simplifying the manufacturing process and improving the adhesion reliability.SOLUTION: A solar battery module 1 according to the invention includes: a glass plate member 3 fixed to a solar base frame 2; a sealing material 5 having a solar battery cell 4 therein and disposed on a rear surface 3b of the glass plate member 3; and a fiber net lamination film 6 which is provided at the opposite side of the glass plate member 3 when viewed from the solar battery cell 4 and is joined to the sealing material 5. At least a part of the fiber net lamination film 6 is fixed to the solar base frame 2.

Description

  The present invention relates to a solar cell.

  Conventionally, JP-A-10-271859 is known as a technical document in such a field. This gazette includes an outer transparent plate on which sunlight is incident from the front surface, an inner transparent plate disposed on the back side of the outer transparent plate, and a flat plate solar cell disposed between the outer transparent plate and the inner transparent plate. A solar power generation apparatus provided with a net embedded in an inner transparent plate, and an inner transparent plate and a solar cell that are integrated with each other in surface contact with each other is attached to a fixed member such as a building. .

Japanese Patent Laid-Open No. 10-271859

  By the way, when attaching the solar cell module to a fixing member such as a vehicle body, from the viewpoint of simplification of the manufacturing process and adhesion reliability, the area of the light transmitting plate member such as the outer glass plate is made slightly larger than the solar cell, The structure which joins the outer peripheral part to a vehicle body is employ | adopted. In this configuration, even if a net is embedded in the inner transparent plate as in the above-described conventional device, it does not contribute to improving the strength of the outer peripheral portion, and when an impact is applied, the load concentrates on the outer peripheral portion fixed to the vehicle body. There was a possibility that the light transmission plate member was damaged.

  Then, an object of this invention is to provide the solar cell which can suppress the failure | damage of a light transmissive board member, aiming at the simplification of a manufacturing process and the improvement of adhesive reliability.

  In order to solve the above problems, a solar cell according to the present invention includes a light-transmitting plate member fixed to a fixing member and a solar battery cell inside, and a seal disposed on the surface of the light-transmitting plate member. And a sheet member that is provided on the opposite side of the light transmission plate member as viewed from the solar cell and joined to the sealing material, and at least a part of the sheet member is fixed to the fixing member. It is characterized by that.

  According to this solar cell, the light transmission plate member is fixed to a fixing member (for example, a vehicle body or a building) via an adhesive layer, so that the manufacturing process is not complicated and the manufacturing process is simplified. The adhesion reliability can be improved. Moreover, in this solar cell, the intensity | strength of the whole solar cell can be improved by providing the sheet | seat member joined to the sealing material. Moreover, according to this solar cell, since at least a part of the sheet member is fixed to the fixing member, even if an impact (or load) is applied to the surface of the light transmission plate member, the impact is transmitted through the sheet member. A part can escape to the fixing member side, and damage to the light transmission plate member can be suppressed. Furthermore, when an excessive input is applied to a fixing member such as a vehicle body, even if the light transmission plate member is damaged, the sheet member directly fixed to the fixing member can minimize the opening of the light transmission plate member mounting portion. Can be.

In the solar cell according to the present invention, the light transmitting plate member may be bonded and fixed to the fixing member on the surface where the sealing material is not disposed on the surface of the light transmitting plate member on which the sealing material is disposed.
According to this solar cell, the surface that reinforces the light transmissive plate member with the sheet member and on which the sealing material of the light transmissive plate member is not disposed (for example, the outer peripheral portion that protrudes once from the sealing material) is defined as the adhesive surface. By doing so, the manufacturing process is simplified and the adhesion reliability is improved.

In the solar cell according to the present invention, the sheet member protrudes in four directions centering on the sealing material when viewed from the thickness direction of the light transmitting plate member, and is fixed to the fixing member in the four directions of the sealing material. May be.
According to this solar cell, since the end portion of the sheet member is fixed to the fixing member at the four sides of the sealing material, even if an impact is applied to the surface of the light transmission plate member, the impact is appropriately dispersed through the sheet member. It is possible to sufficiently suppress the breakage of the light transmission plate member.

In the solar cell which concerns on this invention, the back sheet | seat arrange | positioned on the opposite side of the light transmissive plate member with respect to the sealing material is further provided, and the sheet member may be integrated with the back sheet.
According to this solar cell, since the sheet member is integrated with the back sheet, the back sheet can bear a part of the impact transmitted through the sheet member, and the damage to the light transmission plate member can be further suppressed. it can.

In the solar cell according to the present invention, a part of the sheet member may be bonded to the sealing material inside the sealing material.
According to this solar cell, since a part of the sheet member is joined to the encapsulant inside the encapsulant, the sheet member and the encapsulant are firmly joined. Strength can be improved.

In the solar cell according to the present invention, the first gas barrier sheet is provided along the outer periphery of the sealing material, provided along the outer periphery of the sealing material, and disposed along the outer periphery of the sealing material. And a second gas barrier sheet disposed on the opposite side of the light transmissive plate member from the sheet member, and the sheet member may be sandwiched between the first gas barrier sheet and the second gas barrier sheet.
According to this solar cell, since the first gas barrier sheet and the second gas barrier sheet sandwich the sheet member, it is possible to suppress intrusion of gas or moisture in the air into the sealing material. It is possible to extend the service life.

  In the solar cell according to the present invention, the fixing member may be a vehicle body or a fixture attached to the vehicle body.

  According to the vehicle equipped with the solar cell according to the present invention, it is possible to suppress the breakage of the light transmission plate member while simplifying the manufacturing process and improving the adhesion reliability. Furthermore, even if an excessive input is applied to the fixing member and the light transmitting plate member is damaged, the opening at the mounting position of the light transmitting plate member can be minimized.

It is an end view which shows the solar cell module which concerns on 1st Embodiment. It is a back view which shows the solar cell module which concerns on 1st Embodiment. It is an end view which shows the solar cell module which concerns on 2nd Embodiment. It is an expanded sectional view of FIG. It is a back view which shows the solar cell module which concerns on 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
A solar cell module 1 according to the first embodiment shown in FIG. 1 is a device that is attached to the upper surface of a vehicle body A, for example, and converts light energy into electric power. The solar cell module 1 is fixed to the vehicle body A through a square frame-shaped solar base frame 2. The solar base frame 2 corresponds to a fixing member described in the claims. Instead of the solar base frame 2, a fixture for attaching the solar cell module 1 to the vehicle body A may be adopted as the fixing member described in the claims.

  Further, the solar cell module 1 may be directly fixed to the vehicle body A without using a fixing tool such as the solar base frame 2. For example, the solar cell module 1 may be embedded in the ceiling of the vehicle body A, and the solar cell module 1 may constitute a part of the vehicle body A. In this case, the vehicle body A corresponds to the fixing member described in the claims.

  In addition, although this embodiment demonstrates the case where the solar cell module 1 is mounted in the vehicle body A, it is not limited to this. For example, the present invention is also applicable when the solar cell module is fixed to a building such as a house. In this case, a building such as a house (for example, a part of the roof or a fixture for mounting on the building) corresponds to the fixing member described in the claims.

  FIG. 2 is a back view of the solar cell module 1. In FIG. 2, the illustration of the solar base frame 2 is omitted. As shown in FIGS. 1 and 2, the solar cell module 1 includes a glass plate member (light transmission plate member) 3, solar cells 4, a sealing material 5, and a fiber net laminate film (sheet member, back sheet) 6. It has.

  The glass plate member 3 is a thick plate member on which the sunlight S is incident on the surface 3 a and forms the uppermost surface of the solar cell module 1. The glass plate member 3 has an appropriate thickness in order to ensure the strength of the solar cell module 1.

  In the center of the back surface 3b of the glass plate member 3, a sealing material 5 having a solar battery cell 4 therein is disposed. The outer peripheral side of the back surface 3 b of the glass plate member 3 is used as an adhesive surface, and is fixed to the rectangular frame-shaped solar base frame 2 via the adhesive layer 7. The adhesive layer 7 is a layer made of urethane resin, for example, and is formed so as to surround the sealing material 5 along the outer periphery of the glass plate member 3. The adhesive layer 7 has a sufficient thickness to allow an assembly error between the glass plate member 3 and the solar base frame 2.

  In addition, it may replace with the glass plate member 3, and may employ | adopt the light transmissive plate member which consists of transparent resin, such as an acryl, a polyimide, an engineering plastic.

  The solar cell 4 is a device that directly converts light energy into electric power by utilizing the photovoltaic effect. In the present embodiment, silicon-based solar cells 4 are used. Note that various types of solar cells 4 can be adopted, and compound-type or organic-type other solar cells may be used instead of silicon-type.

  The sealing material 5 is a transparent resin material for protecting the solar battery cell 4, and is made of, for example, EVA [Ethylene Vinyl Acetate]. Inside the sealing material 5, a plurality of solar cells 4 are arranged in the same plane, and in this embodiment, a total of 12 (4 × 3 rows) solar cells 4 are arranged at a predetermined interval. ing. The number and arrangement of solar cells 4 are not limited to those shown in FIG. The sealing material 5 formed into a plate shape has an upper surface bonded to the back surface 3 b of the glass plate member 3 and a lower surface covered with a fiber net laminate film 6.

  The fiber net laminate film 6 is a back sheet formed by sandwiching a lattice-shaped high-strength reinforcing fiber net 8 between film materials. That is, the high-strength reinforcing fiber net 8 is integrated with the back sheet. The fiber net laminate film 6 is provided on the lower surface of the sealing material 5 on the side opposite to the glass plate member 3 when viewed from the solar battery cell 4.

  The high-strength reinforcing fiber net 8 is made of, for example, an aramid fiber, a carbon fiber, or a super-stretched polyolefin. The high-strength reinforcing fiber net 8 is preferably made of a highly heat conductive material such as carbon fiber. In this case, since the heat generated in the solar battery cell 4 can be released through the high-strength reinforcing fiber net 8, the temperature rise of the solar battery cell 4 can be suppressed, and the power generation efficiency of the solar battery module 1 can be increased. . The high-strength reinforcing fiber net 8 is also disposed at the end 6 a of the fiber net laminate film 6.

  As shown in FIG. 2, the fiber net laminate film 6 has a slightly larger area than the sealing material 5, and the sealing material 5 including the solar battery cell 4 is located at the center thereof. The center side of the fiber net laminate film 6 is bonded to the sealing material 5.

  The end 6a on the outer peripheral side of the fiber net laminate film 6 is outside the sealing material 5 when viewed from the thickness direction of the glass plate member 3 (the direction of the arrow T in FIG. 1, which corresponds to the vertical direction in the present embodiment). positioned. The end 6 a of the fiber net laminate film 6 protrudes outward on the entire outer periphery of the sealing material 5 and is surface-bonded to the solar base frame 2. The end 6a of the fiber net laminate film 6 may be directly fixed to the vehicle body A.

  In addition, the edge part 6a of the fiber net laminate film 6 does not necessarily need to protrude outside in the whole outer periphery of the sealing material 5, and it sees from the thickness direction T of the glass plate member 3, and the sealing material 5 is the center. The aspect which protrudes in four directions and was fixed to the solar base frame 2 (or vehicle body A) may be sufficient. The four directions correspond to the front, rear, left and right directions of the vehicle when the solar cells 4 are horizontally arranged, for example. Even in this case, the fiber net laminate film 6 can be fixed to the vehicle body A with sufficient strength. It should be noted that only a part of the end portion 6a of the fiber net laminate film 6 (for example, a square corner portion drawn by the end portion 6a in FIG. 2) may be fixed to the solar base frame 2 or the vehicle body A instead of the four sides. .

  Further, the fiber net laminate film 6 does not need to be fixed to the solar base frame 2 in a constantly stretched state, and some slack may exist. In this case, if the fiber net laminate film 6 is stretched when an impact or load is applied to the surface 3a of the glass plate member 3, the impact or the like can be released to the vehicle body A.

  A part of the fiber net laminate film 6 is bonded to the back surface 3 b of the glass plate member 3. Specifically, a portion of the outer peripheral portion of the fiber net laminate film 6 that is inside the end portion 6 a is bonded to the back surface 3 b of the glass plate member 3. Thereby, since the fiber net laminate film 6 is arrange | positioned so that all the sides of the sealing material 5 may also be covered, the penetration | invasion of the gas in the air and a water | moisture content with respect to the sealing material 5 can be suppressed. Further, since the fiber net laminate film 6 is directly bonded to the glass plate member 3, it contributes to an improvement in strength on the outer peripheral side of the glass plate member 3.

  According to the solar cell module 1 according to the first embodiment described above, the glass plate member 3 is fixed to the vehicle body A via the adhesive layer 7, so that the manufacturing process is not complicated. Simplification of the manufacturing process and improvement of adhesion reliability can be achieved. Moreover, in this solar cell module 1, the intensity | strength of the whole solar cell module can be improved by providing the fiber net laminate film 6 joined to the sealing material 5. FIG. Moreover, according to this solar cell module 1, the end 6a of the fiber net laminate film 6 is fixed to the vehicle body A via the solar base frame 2, so that an impact (or load) is applied to the surface 3a of the glass plate member 3. Even if it is added, part of the impact can be released to the vehicle body A side through the fiber net laminate film 6, and damage to the glass plate member 3 can be suppressed. Furthermore, when an excessive input is applied to the solar base frame 2, even if the glass plate member 3 is broken, the fiber net laminate film 6 directly fixed to the solar base frame 2 is used to The opening can be minimized.

  Moreover, according to this solar cell module 1, on the surface of the glass plate member 3 on which the sealing material 5 is disposed, the surface on which the sealing material 5 is not disposed (that is, the outer periphery protruding once from the sealing material 5). Since the glass plate member 3 is bonded and fixed to the vehicle body A at the surface of the portion), the glass plate member 3 is reinforced with the fiber net laminate film 6 and the surface of the glass plate member 3 on which the sealing material 5 is not disposed. By using as the bonding surface, the manufacturing process is simplified and the bonding reliability is improved.

  Further, according to the solar cell module 1, the end 6 a of the fiber net laminate film 6 protrudes outward in the entire outer periphery of the sealing material 5 when viewed from the thickness direction T of the glass plate member 3, and the solar base frame 2 is Since it is fixed to the vehicle body A via the fiber net laminate film 6, the impact can be properly dispersed even if an impact is applied to the surface 3 a of the glass plate member 3, and the damage to the glass plate member 3 is sufficiently suppressed. can do.

  Furthermore, according to this solar cell module 1, since the high-strength reinforcing fiber net 8 is integrated with the fiber net laminate film (back sheet) 6, a part of the impact transmitted through the high-strength reinforcing fiber net 8 is reduced to the back sheet. The damage of the glass plate member 3 can be further suppressed.

[Second Embodiment]
In the solar cell module 10 according to the second embodiment, the high-strength reinforcing fiber net (sheet member) 11 is not integrated with the back sheet 14 as compared with the first embodiment, and is inside the sealing material 12. The point which is mainly joined with the sealing material 12 is different. In addition, the same code | symbol is attached | subjected to the component which is the same as that of 1st Embodiment, or is equivalent, and description is abbreviate | omitted.

  FIG. 3 is an end view showing the solar cell module according to the second embodiment, and FIG. 4 is a partially enlarged view of FIG. As shown in FIGS. 3 and 4, in the solar cell-equipped vehicle according to the second embodiment, the central portion of the lattice-like high-strength reinforcing fiber net 11 is included in the sealing material 12, and the sealing material 12 is joined to the sealing material 12. The high-strength reinforcing fiber net 11 is disposed below the solar battery cell 4 in the sealing material 12 (on the opposite side of the glass plate member 3). A back sheet made of an aluminum-containing PET [polyethylene terephthalate] film is disposed on the lower surface of the sealing material 12.

  Here, a broken line C shown in FIG. 4 is a center line in the thickness direction T of the solar cell module 10 (a bisector in the thickness direction T). As shown in FIG. 4, the high-strength reinforcing fiber net 11 is preferably located below the central axis C. In this case, an impact is applied to the surface 3a of the glass plate member 3 by flying stones and the like, and the strength against pulling on the lower side of the solar cell module 10 can be ensured even if bending from above occurs.

  FIG. 5 is a back view showing the solar cell module 10 according to the second embodiment. In FIG. 5, illustration of the solar base frame 13 and the back sheet 14 is omitted. As shown in FIGS. 3 and 5, the end 11 a of the high-strength reinforcing fiber net 11 protrudes outward in the entire outer periphery of the sealing material 12 when viewed from the thickness direction T of the glass plate member 3. The end portion 11a of the high-strength reinforcing fiber net 11 is hung on a plurality of hook portions formed on a rectangular frame-shaped solar base frame 13, and is fixed to the solar base frame 13 while being pulled in all directions.

  In the solar cell module 10 according to the second embodiment, the first gas barrier sheet 15 and the second gas barrier sheet 16 are provided along the outer periphery of the sealing material 12. The first gas barrier sheet 15 and the second gas barrier sheet 16 are made of, for example, aluminum tape, and are intended to prevent intrusion of gas or moisture in the air into the sealing material 12.

  The first gas barrier sheet 15 is provided in a state where a part thereof is sandwiched between the sealing material 12 and the glass plate member 3, and is located on the upper side (the glass plate member 3 side) from the solar cells 4. . Further, the second gas barrier sheet 15 is provided in a state where a part thereof is adhered to the lower surface of the back sheet 14, and is located below the high-strength reinforcing fiber net 11 (opposite the glass plate member 3). . The first gas barrier sheet 15 and the second gas barrier sheet 16 are bonded so as to sandwich the high-strength reinforcing fiber net 11 on the side of the sealing material 12.

  Also in the solar cell module 10 according to the second embodiment described above, a part of the impact applied to the surface 3a of the glass plate member 3 through the high-strength reinforcing fiber net 11 can be released to the vehicle body A side. Moreover, damage to the glass plate member 3 can be suppressed. Moreover, according to this solar cell module 10, a part of the high-strength reinforcing fiber net 11 is joined to the sealing material 12 inside the sealing material 12. Thus, the strength of the solar cell module 10 can be improved.

  Furthermore, according to this solar cell module 10, the first gas barrier sheet 15 and the second gas barrier sheet 16 sandwich the high-strength reinforcing fiber net 11 on the side of the sealing material 12, thereby providing the sealing material. Since it can suppress that the gas and water | moisture content in air | atmosphere penetrate | invade into 12, the lifetime improvement of the solar cell module 10 can be achieved.

  The present invention is not limited to the embodiment described above. For example, the dimensional ratio of the glass plate member, the sealing material, and the solar battery cell is an example, and an appropriate dimensional ratio according to the product can be adopted. Moreover, the glass plate member (light transmissive plate member) may be fixed on a surface orthogonal to the surface on which the sealing material is provided. The glass plate member may be in a cantilever state.

  Further, the shape of the solar base frame is not limited to that shown in FIGS. 1 and 3, and may be a pair of rails extending in parallel, for example, having an appropriate shape according to the type of vehicle and location to be attached. Adopted. The shape of the high-strength reinforcing fiber net does not have to be a perfect lattice shape, but may be a shape that can ensure the strength as a so-called net, and the end portion does not necessarily have a square frame shape.

DESCRIPTION OF SYMBOLS 1,10 ... Solar cell module 2,13 ... Solar base frame (fixing member) 3 ... Glass plate member (light transmission board member) 3a ... Front surface 3b ... Back surface 4 ... Solar cell 5,12 ... Sealing material 6 ... Fiber Net laminate film (sheet member, back sheet) 6a, 11a ... end 7 ... adhesive layer 8, 11 ... high strength reinforcing fiber net (sheet member) 14 ... back sheet 15 ... first gas barrier sheet 16 ... second gas barrier Seat A ... Car body (fixing member) C ... Center axis S ... Sunlight

Claims (7)

A light transmission plate member fixed to the fixing member;
A solar cell having inside, a sealing material disposed on the surface of the light transmission plate member, and
A sheet member provided on the opposite side of the light transmission plate member as viewed from the solar cell, and joined to the sealing material,
The solar cell according to claim 1, wherein at least a part of the sheet member is fixed to the fixing member.   2. The light transmitting plate member is bonded and fixed to the fixing member on a surface where the sealing material is not disposed on a surface of the light transmitting plate member on which the sealing material is disposed. The solar cell as described in.   Ends of the sheet member protrude in four directions centered on the sealing material as seen from the thickness direction of the light transmission plate member, and are fixed to the fixing member in the four directions of the sealing material. The solar cell according to claim 1, wherein the solar cell is a solar cell. A back sheet disposed on the opposite side of the light transmission plate member with respect to the sealing material;
The solar cell according to any one of claims 1 to 3, wherein the sheet member is integrated with the back sheet.   4. The solar cell according to claim 1, wherein a part of the sheet member is bonded to the sealing material inside the sealing material. A first gas barrier sheet provided along the outer periphery of the sealing material and disposed on the light transmission plate member side from the solar battery cell;
A second gas barrier sheet provided along the outer periphery of the sealing material and disposed on the opposite side of the light transmission plate member from the sheet member;
Further comprising
The solar cell according to any one of claims 1 to 5, wherein the sheet member is sandwiched between the first gas barrier sheet and the second gas barrier sheet. The solar cell according to any one of claims 1 to 6, wherein the fixing member is a vehicle body or a fixture attached to the vehicle body.

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