JP2012009907A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module which simplifies a structure for extracting electric power generated by a solar cell.SOLUTION: A solar cell module 100 according to an embodiment includes a solar cell 20, a translucent member 10, a housing 30, and a conductive output cable 40 embedded in the housing 30. One end of the output cable 40 is electrically connected to the solar cell 20 and the other end of the output cable 40 is exposed to the outside of the housing 30. A fixture 45 (locking portion) which locks the output cable 40 in the housing 30 is provided at the output cable 40.

Description

  The present invention relates to a solar cell module including an output cable that sends electric power generated by a solar cell to an external device.

  Generally, in a solar cell module, a solar cell is sealed with a sealing material between a light-receiving surface side protective material and a back surface side protective material. The light-receiving surface side protective material is composed of a glass plate or the like. The back side protective material is composed of a polyethylene terephthalate (PET) film or the like.

A wiring material for taking out the electric power generated by the solar cell is connected to the solar cell. The wiring material passes through the sealing material and is drawn out from the opening formed in the back surface side protective material. A portion of the wiring material that is drawn out from the opening is stored in a terminal box that is attached so as to cover the opening. The wiring member is electrically connected to an output cable for sending electric power generated by the solar cell to an external device in the terminal box (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 3-116978 JP 2007-165773 A

  Here, when the output cable is attached to an external device, the output cable may be pulled by an external force. Therefore, it is necessary to fix the output cable to the inner wall of the terminal box using a fixture so that the output cable does not fall out of the terminal box.

  Moreover, in the usage environment of a solar cell module, there exists a possibility that a water | moisture content may permeate from the opening formed in the back surface side protective material. Therefore, it is necessary to seal the inside of the terminal box with a sealing material so that outside air does not flow into the terminal box.

  Thus, the structure for taking out the electric power generated by the solar cell to the outside of the solar cell module is configured using a large number of components. Therefore, complicated assembly work is required in the manufacturing process of the solar cell module.

  Then, this invention is made | formed in view of such a condition, and it aims at providing the solar cell module which simplified the structure which takes out the electric power generated by the solar cell.

  A first feature of the present invention relates to a solar cell module, which has a light receiving surface and a back surface provided on the opposite side of the light receiving surface, and generates power by receiving light on the light receiving surface, and light reception of the solar cell. A translucent member that covers the surface side, a casing that covers the back side of the solar cell, and a conductive output cable embedded in the casing, and the casing is integrally formed of resin The one end of the output cable is electrically connected to the solar cell, the other end of the output cable is exposed to the outside of the housing, and the output cable has a locking portion for locking the output cable inside the housing. Is provided.

Thus, since the output cable is directly embedded in the housing, it is not necessary to attach a terminal box or the like. Therefore, it is not necessary to perform complicated assembly work in the manufacturing process of the solar cell module. Further, since the output cable is provided with a locking portion for locking the output cable in the housing, the output cable can be firmly fixed even when the output cable is directly embedded in the housing.

  A second feature of the present invention relates to the first feature of the present invention, wherein the outer diameter of a part of the output cable is formed larger than the outer diameter of the other part connected to the part, It is a summary.

  A third feature of the present invention relates to the first feature of the present invention, wherein a fixture is attached to the output cable, the fixture projects from the outer periphery of the output cable, and the locking portion is The gist is that it is a fixture.

  A fourth feature of the present invention relates to the first feature of the present invention, wherein the output cable has a connection terminal attached to the other end of the output cable, and the connection terminal is embedded in the housing. The first portion and the second portion exposed to the outside of the housing, and the locking portion is the first portion.

  A fifth feature of the present invention relates to the first feature of the present invention, and is summarized in that the output cable has a bent portion that is bent, and the locking portion is a bent portion.

  ADVANTAGE OF THE INVENTION According to this invention, the solar cell module which simplified the structure which takes out the electric power generated with a solar cell can be provided.

It is a top view which shows the structure of the solar cell module 100 which concerns on 1st Embodiment of this invention. It is sectional drawing in the AA cut surface of FIG. It is sectional drawing in the BB cut surface of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a figure which shows the structure of the spherical part 75 which is a latching | locking part which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the linear part 85 which is a latching | locking part which concerns on the modification of 2nd Embodiment of this invention. It is a figure which shows the structure of the connection terminal 95 which is a latching | locking part which concerns on 3rd Embodiment of this invention. It is a figure which shows the structure of the bending part 100 which is a latching | locking part which concerns on 4th Embodiment of this invention.

Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.
1. First embodiment (schematic configuration of solar cell module)
A schematic configuration of the solar cell module 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a top view showing the configuration of the solar cell module 100. 2 is a cross-sectional view taken along the line AA of FIG. 3 is a cross-sectional view taken along the line BB in FIG.

  As shown in FIGS. 1 to 3, the solar cell module 100 includes a translucent member 10, a solar cell 20, a housing 30, an output cable 40, a terminal block 50, and a wiring member 60.

  The translucent member 10 protects the light receiving surface side of the solar cell module 100. As the translucent member 10, a translucent member such as glass or translucent plastic can be used. In the present embodiment, the translucent member 10 is a single substrate of the solar cell 20, and a translucent conductive oxide (TCO) is formed on the back surface of the translucent member 10. .

  The solar cell 20 is formed on the back surface of the translucent member 10, as shown in FIG. Specifically, the solar cell 20 is formed by sequentially laminating a light-transmitting conductive film, a semiconductor layer, and a back electrode while patterning by a known laser patterning method. The solar cell 20 is an integrated solar cell composed of a plurality of solar cell elements electrically connected in series.

  As the semiconductor layer, for example, a stacked body or a single body of an amorphous silicon semiconductor layer and a microcrystalline silicon semiconductor layer can be used. The amorphous silicon semiconductor layer and the microcrystalline silicon semiconductor layer each have a pin semiconductor bond.

  Solar cell 20 has a light receiving surface and a back surface provided on the opposite side of the light receiving surface. The light receiving surface of the solar cell 20 is covered with the translucent member 10. The solar cell 20 generates electric power by receiving sunlight that has passed through the translucent member 10 at the light receiving surface.

  The housing 30 is formed across the back surface of the solar cell 20 and the side surface of the translucent member 10. The housing 30 can be integrally formed by using, for example, phenol resin, epoxy resin, melanin resin, thermosetting polyimide, polyurethane, unsaturated polyester, alkyd resin, urea resin, olefin resin, or the like. As will be described later, the housing 30 is formed by pouring the resin into a mold in which the translucent member 10 and the solar cell 20 are set. Therefore, the solar cell 20 is sealed in the housing 30 without using other members.

  The housing | casing 30 has the leg part 35, as shown in FIG.1 and FIG.2. The leg portion 35 has a hole 35a to which a bolt for fixing the solar cell module 100 to the installation location is attached. Further, as shown in FIG. 2, a plurality of rib members 36 are attached to the back surface of the housing 30 for the purpose of improving the strength of the solar cell module 100. The plurality of rib members 36 are arranged over the entire length of the solar cell module 100.

  The output cable 40 is a cable for sending the electric power generated by the solar battery 20 to an external device. The output cable 40 includes a metal core wire and an insulating film covering the core wire. As shown in FIG. 2, the output cable 40 is embedded in the housing 30. One end of the output cable 40 is soldered to the terminal block 50. The other end of the output cable 40 is exposed outside the housing 30. A connection terminal connected to an external device is attached to the other end of the output cable 40.

  Here, as shown in FIG. 2, a fixture 45 (an engaging portion) is attached to the output cable 40. The fixing tool 45 protrudes from the outer periphery of the output cable 40.

  The terminal block 50 is a conductive material for electrically connecting the output cable 40 and the wiring material 60. The terminal block 50 is embedded in the housing 30.

  The wiring member 60 is a conductive material for taking out the electric power generated by the solar cell 20 from the solar cell. As the wiring member 60, copper or the like formed into a thin plate shape, a wire shape, or a twisted wire shape can be used. As shown in FIGS. 2 and 3, one end of the wiring member 60 is soldered to both end portions of the solar cell 20. The other end of the wiring member 60 is soldered to the terminal block 50. Thereby, the electric power generated by the solar cell 20 is taken out of the solar cell module via the output cable 40. The wiring member 60 is embedded in the housing 30. In addition, it is preferable that the outer periphery of the wiring member 60 is subjected to an insulation process.

In the present embodiment, as described above, the power generated by the solar cell 20 is sent to the output cable 40 via the wiring member 60 and the terminal block 50. However, the output cable 40 is directly connected to the solar cell. It may be soldered to 20 end portions.
(Configuration of fixture)
Next, the configuration of the fixture 45 will be described with reference to FIG. FIG. 4A is a partially enlarged view of FIG. FIG. 4B is a perspective view showing an attachment state of the fixture 45.

  As shown in FIG. 4A, a fixture 45 is attached to the output cable 40. The fixture 45 has a first surface 45a and a second surface 45b provided on the opposite side of the first surface 45a. The fixture 45 is embedded in the resin constituting the housing 30. The fixing tool 45 (specifically, the first surface 45a and the second surface 45b) protrudes from the outer periphery of the output cable 40. Therefore, as shown in FIG. 4A, the fixture 45 is arranged so as to bite into the resin constituting the housing 30.

  The fixture 45 is a flat metal member. As shown in FIG. 4B, a through hole penetrating from the first surface 45a to the second surface 45b is formed in the fixture 45. The fixing tool 45 is firmly attached to the output cable 40 by caulking the fixing tool 45 from both sides with the output cable 40 inserted into the through hole. Accordingly, the first surface 45a and the second surface 45b are substantially orthogonal to the direction α in which the output cable 40 extends.

Note that the fixture 45 is not limited to a metal member, and can be formed of the same type of resin as that constituting the housing 30.
(Method for manufacturing solar cell module)
First, a translucent conductive film is formed on the translucent member 10 by a film forming method such as a CVD method or a sputtering method. Next, a semiconductor layer is formed over the light-transmitting conductive film by a CVD method. Specifically, a pin-type amorphous silicon semiconductor is sequentially stacked over a light-transmitting conductive film, and then a pin-type microcrystalline silicon semiconductor is sequentially stacked. Next, a back electrode is formed on the semiconductor layer by sputtering or the like. In this case, it can be divided into a plurality of solar cell elements electrically connected in series by a known laser patterning method.

  Next, one end of the pair of wiring members 60 is soldered to both ends of the solar cell 20, and the other end is soldered to the terminal block 50.

  Next, two output cables 40 composed of a metal core wire and an insulating film covering the core wire are prepared. A fixing tool 45 is fixed at a predetermined position of the output cable 40. Next, one end of the output cable 40 is soldered to the terminal block 50. Thereby, the output cable 40 and the solar cell 20 are electrically connected. Thus, the solar cell submodule is manufactured.

Next, the solar cell submodule is set in a predetermined mold. Subsequently, a thermoplastic resin is poured into the mold, and pressure is applied at about 50 MPa for 30 minutes while heating to 150 ° C. Thereafter, the mold is cooled and the solar cell module 100 is taken out.
(Function and effect)
The solar cell module 100 according to this embodiment includes a solar cell 20, a translucent member 10, a housing 30, and a conductive output cable 40 embedded in the housing. One end of the output cable 40 is electrically connected to the solar cell 20, and the other end of the output cable 40 is exposed outside the housing 30.

  Thus, the electric power generated by the solar cell 20 is taken out of the solar cell module 100 by the output cable 40. Since the output cable 40 is directly embedded in the housing 30, it is not necessary to attach a terminal box or the like. Therefore, it is not necessary to perform complicated assembly work in the manufacturing process of the solar cell module 100.

  Further, the output cable 40 is provided with a fixture 45 (locking portion) that locks the output cable 40 in the housing 30. The fixing tool 45 protrudes from the outer periphery of the output cable 40.

Thus, the fixture 45 is disposed so as to bite into the resin constituting the housing 30. Therefore, even if the output cable 40 is pulled by an external force, the output cable 40 is locked to the housing 30 by the fixture 45. Specifically, the fixture 45 is locked to the resin constituting the housing 30 on the first surface 45a. Thereby, even when the output cable 40 is directly embedded in the housing 30, the output cable 40 can be firmly fixed.
2. Second Embodiment Next, a second embodiment of the present invention will be described. The difference between this embodiment and the said 1st Embodiment is the structure of a latching | locking part.

In the present embodiment, since the schematic configuration of the solar cell module is the same as that of the first embodiment, differences from the first embodiment will be mainly described below.
(Configuration of locking part)
The configuration of the locking portion will be described with reference to FIG. FIG. 5 is a diagram illustrating a configuration of a spherical portion 75 that is a locking portion according to the present embodiment.

  As shown in FIG. 5, the outer diameter of a part of the output cable 40 is formed larger than the outer diameter of the other part connected to the part. Specifically, the output cable 40 has a spherical portion 75, and the outer diameter of the spherical portion 75 is larger than the outer diameter of a straight portion other than the spherical portion 75. The spherical portion 75 is embedded in the resin constituting the housing 30. Therefore, as shown in FIG. 5, the spherical portion 75 is arranged so as to bite into the resin constituting the housing 30.

Such a spherical portion 75 can be formed by making a part of the insulating film of the output cable 40 spherical. The shape of the core wire in the spherical portion 75 is not limited.
(Function and effect)
The output cable 40 according to the present embodiment is provided with a spherical portion 75 (locking portion) that locks the output cable 40 in the housing 30. The outer diameter of the spherical portion 75 is formed to be larger than the outer diameter of the straight portion connected to the spherical portion 75.

As described above, the spherical portion 75 is arranged so as to bite into the resin constituting the housing 30. Therefore, even if the output cable 40 is pulled by an external force, the output cable 40 is locked to the housing 30 by the spherical portion 75. Thereby, even when the output cable 40 is directly embedded in the housing 30, the output cable 40 can be firmly fixed.
3. Modified Example of Second Embodiment Next, a modified example of the second embodiment will be described. The difference between this modification and the second embodiment is the configuration of the locking portion.

Also in this modification, since the schematic structure of a solar cell module is the same as that of the said 1st Embodiment, hereafter, the difference with the said 2nd Embodiment is mainly demonstrated.
(Configuration of locking part)
The configuration of the locking portion will be described with reference to FIG. FIG. 6 is a diagram illustrating a configuration of a straight line portion 85 that is a locking portion according to the present embodiment.

  As shown in FIG. 6, the outer diameter of a part of the output cable 40 is formed larger than the outer diameter of the other part connected to the part. Specifically, the output cable 40 has a narrow portion 86, and the outer diameter of the straight portion 85 is larger than the outer diameter of the narrow portion 86 connected to the straight portion 85. Accordingly, the straight portion 85 has a locking surface 85a. The locking surface 85 a is an outer peripheral surface connected to the straight portion 85 and the narrow portion 86. The straight portion 85 and the narrow portion 86 are embedded in the resin constituting the housing 30. Therefore, as shown in FIG. 6, the straight portion 85 is arranged so as to bite into the resin constituting the housing 30.

  Such a narrow portion 86 connected to the straight portion 85 can be formed by thinning a part of the insulating film of the output cable 40. In addition, there is no restriction | limiting in the shape of the core wire in the narrow part 86. FIG.

Even in such a configuration, the outer diameter of a part of the output cable 40 is formed to be larger than the outer diameter of the other part connected to the part, so that the same operations and effects as those of the second embodiment can be obtained.
4). Third Embodiment Next, a third embodiment of the present invention will be described. The difference between this embodiment and the said 1st Embodiment is the structure of a latching | locking part.

In the present embodiment, since the schematic configuration of the solar cell module is the same as that of the first embodiment, differences from the first embodiment will be mainly described below.
(Configuration of locking part)
The configuration of the locking portion will be described with reference to FIG. FIG. 7 is a diagram illustrating a configuration of the connection terminal 95 which is a locking portion according to the present embodiment.

  As shown in FIG. 7, a connection terminal 95 is provided at one end of the output cable 40. The connection terminal 95 is connected to a connection terminal 96 provided on another output cable 41. Connection terminal 95 includes a first portion 95 a embedded in housing 30 and a second portion 95 b exposed to the outside of housing 30.

The outer diameter of the first portion 95a is formed larger than the outer diameter of the second portion 95b. Therefore, as shown in FIG. 7, the first portion 95 a is disposed so as to bite into the resin constituting the housing 30.
(Function and effect)
The output cable 40 according to the present embodiment is provided with a first portion 95a (locking portion) that locks the output cable 40 in the housing 30. The outer diameter of the first portion 95 a embedded in the housing 30 is formed larger than the outer diameter of the second portion 95 b exposed to the outside of the housing 30.

In this way, the first portion 95a is arranged so as to bite into the resin constituting the housing 30. Therefore, even if the output cable 41 connected to the output cable 40 is pulled by an external force, the output cable 40 is locked to the housing 30 by the first portion 95a. Thereby, even when the output cable 40 is directly embedded in the housing 30, the output cable 40 can be firmly fixed.
5). Fourth Embodiment Next, a fourth embodiment of the present invention will be described. The difference between this embodiment and the said 1st Embodiment is the structure of a latching | locking part.

In the present embodiment, since the schematic configuration of the solar cell module is the same as that of the first embodiment, differences from the first embodiment will be mainly described below.
(Configuration of locking part)
The configuration of the locking portion will be described with reference to FIG. FIG. 8 is a diagram illustrating a configuration of the bent portion 100 that is a locking portion according to the present embodiment.

As shown in FIG. 8, the output cable 40 is provided with two bent portions 100 that are bent in the housing 30.
(Function and effect)
The output cable 40 according to the present embodiment is provided with two bent portions 100 that are bent in the housing 30. Therefore, even if the output cable 40 is pulled by an external force, the output cable 40 is locked to the housing 30 by the bent portion 100. Thereby, even when the output cable 40 is directly embedded in the housing 30, the output cable 40 can be firmly fixed.
(Other embodiments)
The present invention can be modified in various ways without departing from the gist of the present invention described above, and the descriptions and drawings constituting a part of this disclosure do not limit the present invention.

  For example, in the embodiment described above, an integrated solar cell has been described as an example of the solar cell 20, but the solar cell 20 may have a configuration in which a plurality of solar cell elements are arranged in a matrix. In this case, what is necessary is just to seal a some solar cell element in a sealing material between a translucent protective material and a back surface side protective material.

  As the solar cell element, a conventionally known solar cell element such as one made of single crystal Si can be used.

  In the first embodiment, the flat fixture 45 is used, but the shape of the fixture 45 is not limited. If it projects from the output cable 40, the effect of the present invention can be obtained.

  Moreover, in the said 2nd Embodiment and its modification, the outer diameter of a part of output cable 40 should just be formed larger than the outer diameter of the other part connected to a part, and there is no restriction | limiting in the shape of a latching | locking part. .

  Moreover, in the said 3rd Embodiment, although the conical connection terminal 95 was used as a latching | locking part, there is no restriction | limiting in the shape of the connection terminal 95. FIG.

  Moreover, in the said 4th Embodiment, although the two bending parts 100 were provided, the bending part 100 may be one.

DESCRIPTION OF SYMBOLS 10 ... Translucent member 20 ... Solar cell 30 ... Housing 35a ... Hole 35 ... Leg part 36 ... Rib member 40 ... Output cable 41 ... Other output cable 45 ... Fixing tool 45a ... 1st surface 45b ... 2nd surface 50 ... Terminal block 60 ... Wiring material 75 ... Spherical part 85 ... Linear part 85a ... Locking face 86 ... Narrow part 95 ... Connection terminal 95a ... First part 95b ... Second part 96 ... Connection terminal 100 ... Bending part

Claims (2)

A solar cell having a light receiving surface and a back surface provided on the opposite side of the light receiving surface, and generating electric power by receiving light on the light receiving surface;
A translucent member covering the light-receiving surface side of the solar cell;
A housing covering the back side of the solar cell;
A conductive output cable embedded in the housing;
A wiring material to which one end of the solar cell is connected;
A terminal block embedded in the housing and connected to the other end of the wiring member;
With
The housing is integrally formed of resin,
One end of the output cable is electrically connected to the solar cell via the terminal block,
The other end of the output cable is exposed to the outside of the housing,
The output cable is provided with a locking portion for locking the output cable in the housing,
The output cable has a bent portion that is bent;
The said latching | locking part is the said bending part, The solar cell module characterized by the above-mentioned.   The solar cell module according to claim 1, wherein the bent portion is bent at an acute angle.

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