JP4179725B2 - Solar cell module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solar cell module that converts light energy into electric power, and more particularly to a solar cell module installed outdoors.
[0002]
[Prior art]
In recent years, solar cell modules that are installed outdoors such as roofs of buildings and convert light energy such as sunlight into electrical energy have been put into practical use. Such a solar cell module includes a solar cell panel in which a solar cell that converts light energy into electric power is covered with a protective layer, a power terminal box for drawing out the electric power converted by the solar cell, and a power terminal box It is constituted by a power cable or the like for transmitting power.
[0003]
In general, it is used as the substantially cubic shape to power terminal box, the power terminal box, the conductive terminals provided therein in a state electrically connected to the power draw of the solar cell, solar panel Adhesive and fixed to the lower surface. Power cable is attached to the side of power terminal box in a state of connecting the one end power terminal box inside the conductive terminals in electrical, substantially arranged parallel to the solar panel.
[0004]
However, the conventional configuration has a configuration in which the solar cell panel is disposed so as to overlap with the power cable, and therefore, the overall height of the device cannot be reduced.
In addition, when the solar cell module having this configuration is embedded in a roof material to form a roof material-integrated solar cell module, the thickness of the roof material itself must be increased in order to accommodate the solar cell module in the roof material. Problems such as deterioration in construction workability due to weight increase of materials, increase in cost, and deterioration in aesthetics occur.
[0005]
As a configuration for solving such a problem, Japanese Patent Application Laid-Open No. 10-229214 discloses a “solar cell panel”. In the “solar cell panel” of Japanese Patent Application Laid-Open No. 10-229214, the power lead portion of the solar cell is provided on the side surface of the solar cell panel, and the power lead portion is disposed on the side surface portion of the solar cell panel in parallel with the solar cell panel. The power cable is electrically connected, and the outside of the connection portion is covered with a fixing member or the like. The fixing member is disposed in close contact with the upper and lower surfaces of the solar cell panel and the surface of the power cable, and prevents rainwater from entering from the outside.
[0006]
[Problems to be solved by the invention]
However, in the configuration of Japanese Patent Laid-Open No. 10-229214, the solar cell power lead-out portion and the power cable are connected from the contact portion between the fixing member serving as a rainwater infiltration path and the upper and lower surfaces of the solar cell panel and the surface of the power cable. There is a problem in that the distance to the contact portion is short and rainwater cannot be sufficiently prevented from entering, and there is a possibility that a short circuit or leakage due to rainwater may occur.
[0007]
Further, in order to extend the rainwater infiltration path, the length of the fixing member is extended, and the contact portion between the fixing member and the upper and lower surfaces of the solar cell panel is moved inward from the edge of the solar cell panel. When the distance from the contact portion between the upper and lower surfaces of the panel to the contact portion between the power lead portion of the solar cell and the power cable is increased, the fixing member disposed on the upper surface of the solar cell panel receives the light from the solar cell. There is also a problem that a part of the surface may be cut off and the conversion efficiency of the solar cell may be lowered.
[0008]
This invention is made | formed in view of such a point, and it aims at providing the solar cell module which can ensure high reliability with respect to long-term use, aiming at low profile.
[0009]
Another object of the present invention is to provide a solar cell module capable of ensuring high reliability for long-term use without reducing the conversion efficiency of the solar cell while reducing the height. .
[0010]
[Means for Solving the Problems]
In the present invention, in order to solve the above-mentioned problem, in a solar cell module that converts light energy into electric power, a solar cell that converts light energy into electric power and a power lead portion provided on the lower surface of the solar cell. A battery panel and at least part of the battery panel is disposed in contact with the lower surface of the solar cell panel, and has a connection hole on the upper surface for drawing electric power directly from the power drawing portion, and is electrically connected to the power drawing portion. A wiring storage part for storing the conductive wiring part formed therein, and a protrusion shorter than the length of the wiring storage part, the protrusion being disposed in contact with the upper surface of the solar cell panel, and the wiring storage part An upper surface holding portion that sandwiches the solar cell panel between the solar cell panel and the conductive wiring portion, and the solar cell panel is disposed on the opposite side of the position where the solar cell panel is disposed. If possess the power terminal box, a and a power cable which is arranged substantially parallel to, the projection portion is that is provide a solar cell module, characterized in being arranged without covering the light receiving surface of the solar cell The
[0011]
Here, the solar cell converts light energy into electric power, the electric power drawing unit draws out the converted electric power, the wiring storage unit includes a conductive wiring unit electrically connected to the electric power drawing unit, and a conductive wiring unit. The infiltration of rainwater into the connection part with the power cable is suppressed, the upper surface holding part holds a part of the upper surface of the solar cell panel, and the power cable is arranged substantially in parallel with the solar cell panel. Reduce thickness.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a first embodiment of the present invention will be described.
[0013]
FIG. 2 is a plan view of the solar cell module 10 in the present embodiment, and FIG. 1 is a cross-sectional view taken along line AA of the solar cell module 10 in FIG. FIG. 3 is a perspective view of the power terminal box 12.
[0014]
The solar cell module 10 includes a solar cell panel 11 that converts light energy into electric power, and a power terminal box 12 that is attached to the solar cell panel 11 and draws out the electric power converted by the solar cell panel 11 to the outside.
[0015]
The solar cell panel 11 has a substantially rectangular planar solar cell 11a that converts light energy into electric energy, a power lead portion 11b that draws out the electric power converted by the solar cell 11a, a transparent cell that seals the solar cell 11a, and the like. The sealing adhesive material 11c, the substantially square planar glass plate 11d having a larger area than the solar cell 11a, and the substantially rectangular planar sealing protection material 11e having an area equivalent to the glass plate 11d. The solar cell 11a is arranged so that its light receiving surface faces upward, and a power lead portion 11b is attached to the lower surface edge portion. The front and back side surfaces of the solar cell 11a and the periphery of the portion where the power lead portion 11b is attached to the solar cell 11a are sealed without gaps by the sealing adhesive 11c, and the glass plate 11d is sealed on the upper surface of the sealing adhesive 11c. The sealing protective material 11e is tightly fixed to the lower surface of the adhesive material 11c. Here, at least a part of the portion directly under the power lead portion 11b is not sealed with the sealing adhesive 11c, and a hole is opened in the region of the sealing protective material 11e located in the portion immediately below. Thereby, at least a part of the power lead-out portion 11b is exposed to the outside, and the power converted by the solar cell 11a is output to the outside through this exposed portion.
[0016]
The power terminal box 12 has a wiring housing part 12a arranged at least partially in contact with the lower surface of the solar cell panel 11, an upper surface holding part 12c arranged at least partially in contact with the upper surface of the solar cell panel 11, And it is comprised by the power cable 12b which transmits the converted electric power outside.
[0017]
The wiring storage portion 12a includes an openable / closable lid 12aa that shuts off the inside of the wiring storage portion 12a from the outside, wires 12ab, 12ad, 12af electrically connected to the power drawing portion 11b, terminals 12ac, 12ag, solar cells The backflow prevention diode 12ae which prevents the backflow of the electric current to 11a and the connection hole 12ah for drawing in electric power from the electric power extraction part 11b are provided. The inside of the wiring housing portion 12a is hollow, and the connection hole 12ah is formed on the upper surface of the wiring housing portion 12a so as to connect the hollow portion and the outside. Further, the connection hole 12ah is disposed at a position that is directly below the power lead portion 11b when the power terminal box 12 is fixed to the solar cell panel 11, so that when the power terminal box 12 is fixed, the power lead is drawn out. The cavity inside the portion 11b and the wiring storage portion 12a is spatially connected by the connection hole 12ah. One end of the wire 12ab is passed through the connection hole 12ah and then electrically connected to the power lead portion 11b, and the other end of the wire 12ab is electrically connected to the terminal 12ac. The terminal 12ac is electrically connected to one end of the backflow prevention diode 12ae via the wire 12ad, and the other end of the backflow prevention diode 12ae is electrically connected to the terminal 12ag via the wire 12af. The lid 12aa is attached to the lower surface side of the wiring storage portion 12a so as to be opened and closed, and operations such as wire wiring in the internal cavity of the wiring storage portion 12a are performed from the lid 12aa portion. The cavity inside the wiring housing portion 12a may be filled and sealed with a sealing material such as silicon after the wiring of the wire 12ab or the like is completed. Thereby, the waterproof property of the conductive wiring portion is further improved, and the upper surface holding portion 12c that can improve the reliability of the device is a protrusion that is disposed in close contact with the upper surface edge portion of the solar cell panel 11. A portion 12ca, a step 12cc that is a step provided on the upper surface, and a metal cover 12cb that covers at least part of the upper surface and the side surface. The upper surface holding portion 12c is configured to be continuous with a part of the wiring storage portion 12a, and is configured so that the cross-sectional shape becomes a substantially U-shape by the combination of the wiring storage portion 12a and the upper surface holding portion 12c. . A part of the upper surface edge part, a part of the side surface, and a part of the lower surface edge part of the solar cell panel 11 are water-tightly bonded and fixed to the inner wall of the substantially U-shaped part with a silicon-based adhesive or the like. At this time, the protruding portion 12ca to be bonded to a part of the upper surface edge portion of the solar cell panel 11 is arranged so that a part thereof does not cover the light receiving surface located on the upper surface of the solar cell 11a. By arranging in this way, it is possible to prevent the conversion efficiency of the solar cell 11a from being lowered without blocking the light irradiated onto the light receiving surface of the solar cell 11a. The step portion 12cc is configured in parallel with the side surface portion of the solar cell panel 11 bonded to the power terminal box 12 on a part of the upper surface of the upper surface holding portion 12c. In the case where a plurality of solar cell modules 10 are installed side by side, the tip portion of the solar cell panel 11 of the solar cell module 10 disposed adjacent to the stepped portion 12 cc is arranged. Positioning can be easily performed. The metal cover 12cb is fixed with an adhesive or the like so as to cover the upper surface and the side surface of the upper surface holding portion 12c to be irradiated with direct light. As a result, it is possible to prevent deterioration such as deformation and alteration of the power terminal box caused by long-term direct light irradiation, and to ensure long-term reliability.
[0018]
The power cable 12b has a conductive core wire 12ba, and the outside is covered with an insulating layer. The power cable 12b is fixed by a presser 12cd and a set screw 12ce in a state where the core wire 12ba located at one end thereof is electrically connected to the terminal 12ag and the periphery of the tip portion is disposed inside the upper surface holding portion 12c. . At this time, the power cable 12b is disposed substantially parallel to the solar cell panel 11 on the side opposite to the position where the solar cell panel 11 is disposed so as not to overlap the solar cell panel 11. Further, the power cable 12b and the mounting height are set to be lower than the stepped portion 12cc. Thereby, when arrange | positioning the several solar cell module 10, it can prevent that the power cable 12b interferes with the other solar cell module arrange | positioned adjacently.
[0019]
Thus, in the solar cell module of the present embodiment, the conductive wiring portion such as the wire 12ab electrically connected to the power lead portion 11b provided on the lower surface of the solar cell 11a included in the solar cell panel 11 is used as the wiring storage portion 12a. Since the power cable 12b is arranged in a watertight manner inside and arranged substantially in parallel with the solar cell panel 11, the power cable 12b is connected to the solar cell while ensuring a sufficiently long penetration path for rainwater in the conductive wiring portion. It becomes possible to attach to the side surface of the panel 11, and it is possible to ensure high reliability for long-term use while reducing the height.
[0020]
Further, in this embodiment, since the conductive wiring portion such as the wire 12ab is stored in a watertight manner inside the wiring storage portion 12a, it is possible to secure a sufficiently long infiltration path with respect to the rainwater of the conductive wiring portion, and the protrusion 12ca. It is possible to configure the solar cell 11a so as not to cover the light receiving surface, and light irradiated on the light receiving surface is not blocked by the power terminal box 12, thereby reducing the conversion efficiency of the solar cell. Therefore, it is possible to achieve a low profile and ensure high reliability for long-term use.
[0021]
Next, a second embodiment of the present invention will be described.
This embodiment is an application example of the first embodiment, in which the solar cell module 10 of the first embodiment is integrated with a roofing material. In the following description, differences from the first embodiment will be mainly described, and description of common parts will be omitted.
[0022]
FIG. 4 is a perspective view showing a configuration of the roofing material integrated solar cell module 20 in the present embodiment.
As shown in FIG. 4, the roof material integrated solar cell module 20 is configured by embedding the solar cell module 10 described in the first embodiment in a roof material 20 a and integrating them.
[0023]
FIG. 5 is a structural diagram showing a state in which a plurality of such roofing material integrated solar cell modules are arranged. In addition, the figure of each roofing material integrated solar cell module shown in FIG. 5 is equivalent to BB sectional drawing of the roofing material integrated solar cell module 20 of FIG.
[0024]
As shown in FIG. 5, when the roofing material integrated solar cell modules 20 and 21 are arranged adjacent to each other along a slope such as a roof, the roofing material integrated solar cell module 20 that is located above the slope is provided. The tip portion of the roofing material 20a is held by the step portion 12cc of the roofing material integrated solar cell module 21 which is located below the slope. Thereby, the position setting at the time of arrange | positioning each roofing material integrated solar cell module becomes easy, and construction work is simplified. Further, the power cable 12b of the roof material integrated solar cell module 21 is disposed at the lower part of the roof material integrated solar cell module 20, and the power cable 12b is disposed in the arrangement of the roof material integrated solar cell module 20. There is no interference. Similarly, the electric power cable which each roof material integrated solar cell module has passes through the lower part of each adjacent roof material integrated solar cell module, and is guide | induced to the control inverter which is not shown in figure.
[0025]
Thus, even if it is the structure integrated with a roof material, the effect similar to 1st Embodiment can be acquired.
Next, a third embodiment of the present invention will be described.
[0026]
FIG. 6 is a cross-sectional view showing the configuration of the solar cell module 30 of the present embodiment.
The solar cell module 30 includes a solar cell 31 a, a solar cell panel 31 having a power lead portion 31 b, and a power terminal box 32. About the structure of the solar cell panel 31, since it is the same as that of 1st Embodiment, description is abbreviate | omitted and it demonstrates focusing on the structure of the power terminal box 32 below.
[0027]
Similarly to the first embodiment, the power terminal box 32 includes a wiring storage portion 32b, an upper surface holding portion 32c, and a power cable 32d. The difference from the first embodiment is that a conductive wiring portion such as a lead wire 32ba for transmitting power drawn from the power lead portion 31b is integrally formed with the wiring housing portion 32b. When forming the power terminal box 32, first, the lead wire 32ba and the core wire 32bc are electrically connected to both ends of the backflow prevention diode 32bb. Thereafter, one end of the connected lead wire 32ba, backflow prevention diode 32bb, core wire 32bc, and power cable 32d where the core wire 32bc is arranged is placed inside a mold, an injection mold, etc. And is integrally molded. Here, the power terminal box 32 penetrates through the upper and lower surfaces of the power terminal box 32, and when the power terminal box 32 is fixed to the solar cell panel 31, the power terminal box 32 is located immediately below the power lead portion 31 b. A hole 32a is formed. One end of the lead wire 32ba is exposed from the inner surface of the through hole 32a, and the one end of the exposed lead wire 32ba is fixed to the solar cell panel 31 of the power terminal box 32 and then the lower surface of the power lead portion 31b. Electrically connected. Thereafter, the through hole 32a is filled with a filling material such as silicon (not shown), and the inside of the through hole 32a is insulated and sealed in a watertight manner.
[0028]
As described above, the same effect as that of the first embodiment can be obtained by integrally molding the wiring storage portion 32b together with the lead wire 32ba electrically connected in advance.
[0029]
【The invention's effect】
As described above, in the solar cell module of the present invention, the conductive wiring portion electrically connected to the power lead portion provided on the lower surface of the solar cell included in the solar cell panel is accommodated in the wiring accommodation portion, and the power cable Therefore, it is possible to reduce the height and secure high reliability for long-term use.
[0030]
In addition, since the conductive wiring portion is stored inside the wiring storage portion, a sufficiently long infiltration path for rainwater in the conductive wiring portion can be secured, and the upper surface holding portion is limited to the extent that it does not cover the light receiving surface of the solar cell. It is possible to configure, the light irradiated to the light receiving surface will not be blocked by the power terminal box, it will be low-profile without reducing the conversion efficiency of the solar cell, and high reliability for long-term use It can be secured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of the solar cell module taken along line AA in FIG.
FIG. 2 is a plan view of a solar cell module.
FIG. 3 is a perspective view of a terminal electronic box.
FIG. 4 is a perspective view showing a configuration of a roof material integrated solar cell module.
FIG. 5 is a structural diagram showing a state in which a plurality of roofing material integrated solar cell modules are arranged.
FIG. 6 is a cross-sectional view showing a configuration of a solar cell module.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10, 30 Solar cell module 11, 31 Solar cell panel 11a, 31a Solar cell 11b, 31b Power drawer part 12, 32 Power terminal box 12a, 32b Wiring storage part 12aa Lid 12ab, 12ad, 12af Wire 12ac, 12ag Terminal 12ae, 32bb Backflow prevention diodes 12b, 32d Power cables 12ba, 32bc Core wires 12c, 32c Upper surface holding portion 12ca Projection portion 12cb Metal cover 12cc Step portion 32ba Lead wire

Claims (7)

In solar cell modules that convert light energy into electric power,
A solar cell panel having a solar cell for converting light energy into electric power, and a power lead portion provided on the lower surface of the solar cell;
Conductive wiring that is disposed at least partially in contact with the lower surface of the solar cell panel, has a connection hole on the upper surface for drawing electric power directly from the power extraction portion, and is electrically connected to the power extraction portion A wiring storage part for storing the part inside,
A protrusion that is shorter than the length of the wiring storage portion, the protrusion being disposed in contact with the top surface of the solar cell panel, and an upper surface holding portion that sandwiches the solar cell panel with the wiring storage portion;
The conductive wire portion and electrically connected, have a, a power terminal box and a power cable the the solar cell panel arranged substantially parallel to and on the opposite side of the position where the solar cell panel is disposed,
The solar cell module, wherein the protrusion is disposed without covering a light receiving surface of the solar cell. The solar cell module according to claim 1, wherein the wiring housing portion is filled and sealed with a sealing material. The solar cell panel is disposed by being sandwiched between inner portions of a portion in which a cross-sectional shape formed by a combination of the wiring storage portion and the upper surface holding portion is substantially U-shaped. The solar cell module described. The solar cell module according to claim 1, wherein a step portion for positioning another solar cell module is provided outside the upper surface holding portion. The solar cell module according to claim 4, wherein the power cable is disposed at a position lower than the stepped portion. The solar cell module according to claim 1, wherein at least part of the upper surface and the side surface of the power terminal box is covered with a metal cover. 2. The solar cell module according to claim 1, wherein the power terminal box is formed by being integrally molded together with the conductive wiring portion and the power cable that are electrically connected in advance.

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