JP2000174318A - Solar cell built-in panel and solar cell power-generating system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize electric power generated by remaining sound solar cell modules, even if disconnection or poor contact occurs with a solar cell module, with a simple current-collecting configuration, by connecting multiple solar cell modules in parallel and in all directions over the entire roof in normal tiling method. SOLUTION: With a solar cell module built in a panel main body 2, a negative terminal and a positive terminal of a solar cell module are provided at a position contacting vertically with respect to the terminal of the same polarity of other tile, on the upper surface side under other panel main body 2, while on the lower-surface side above other panel main body 2 at each of four corners where a panel main body overlaps other one, thus constituting a solar cell built-in panel 1. A current-collecting bar 13 is provided on an eaves side, over which tiling is performed in a zigzag manner starting with a panel 1 in a first line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solar cell built-in panel incorporating a solar cell module and a solar cell power generation system using the same.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a solar cell built-in panel for a roof tile which can be roofed in place of a normal roof tile for use in a solar cell power generation system (Japanese Utility Model Publication No. 63-11747). No.). According to this, by performing roofing using this solar cell built-in panel, it is possible to obtain a solar cell power generation system that also serves as the original roof.

[0003]

However, such a conventional solar cell built-in panel and a solar cell power generation system using the same have the following problems. That is, if a disconnection or a contact failure occurs in any of the panels, the entire row of the parallel system including the panel becomes unusable, and the battery module that is generating power is included in the row. However, there is a problem that the generated power cannot be used effectively.

The present invention has been made in view of such conventional problems, and all of a large number of solar cell modules can be connected vertically and horizontally in parallel on the entire roof by the same construction as ordinary roofing. Even if a disconnection or poor connection occurs in one of the solar cell modules, the power generation of all other healthy solar cell modules can be used effectively, and furthermore, the final collection of solar cell power generation An object of the present invention is to provide a solar cell built-in panel whose power configuration can be simplified and a solar cell power generation system using the same.

[0005]

According to a first aspect of the present invention, a solar cell module is incorporated in a tile-like panel main body, and a positive terminal and a negative terminal of the solar cell module are respectively connected to another panel main body of the panel main body. Overlap with 4
In each of the sides or the four corners, the lower part of the other panel main body is located on the upper surface side, the lower part of the other panel main body is located on the lower surface side, and the sun incorporated in the other panel main body. A solar cell built-in panel provided in a pair at a position vertically contacting a terminal of the same polarity of a battery module, wherein the plus terminal and the minus terminal are provided on four sides or four corners of the panel body, respectively. Are shifted forward and backward or left and right by a distance larger than the width of each terminal.

According to a second aspect of the present invention, in the solar cell built-in panel of the first aspect, the panel main body has a slate roof shape, and each of the positive terminal and the negative terminal of the solar cell module overlaps with another panel main body. It is provided at each corner.

According to a third aspect of the present invention, in the solar cell built-in panel according to the first aspect, the panel main body is like a western tile or a Japanese tile, and each of a positive terminal and a negative terminal of the solar cell module is connected to another panel. It is provided on each of the four sides overlapping the main body.

In the solar cell built-in panel according to the first to third aspects of the present invention, the solar cell built-in panel is installed on the roof in a houndstooth check pattern or in a checkerboard pattern, so that each of the panels overlaps the front, rear, left and right. The positive terminal and the negative terminal between the solar cell modules incorporated in each naturally contact each other, and a large number of solar cell modules incorporated in each panel body are all connected in parallel on the entire roof. Can configure a solar cell power generation system,
Thus, even if one or more of the solar cell modules is disconnected or has a poor contact, it is possible to connect all the healthy solar cell modules by bypassing the solar cell module, The generated power of the battery module can be used effectively.

In addition, since the positions of the plus terminal and the minus terminal provided on each of four sides or four corners of each panel body are shifted by a distance larger than the width of each terminal, the solar cell When generating power as a power generation system, install a straight plus current collection bus and minus current collection bus in parallel with the solar panel rows that are aligned in a straight line on the eaves side or the ridge side. For example, the positive and negative terminals of each solar cell panel in the last stage can be in electrical parallel contact with the common positive and negative current collection buses, respectively. Can be

According to a fourth aspect of the present invention, there is provided a solar cell power generation system in which a large number of the solar cell built-in panels according to the first or second aspect are installed in a staggered manner on a roof, wherein the solar cell power generation system is electrically connected to a final stage. The positive terminal and the negative terminal of each of the plurality of solar cell built-in panels arranged in a straight line are connected in common to the parallel positive current collecting bus and negative current collecting bus, respectively. The power generated from the solar cell is taken out from each of the bus and the negative-side collecting bus.

According to a fifth aspect of the present invention, there is provided a solar cell power generation system in which a large number of the solar cell built-in panels according to the first or third aspect are installed on a roof in a grid pattern, and are electrically the final stage. The positive terminal and the negative terminal of each of the plurality of solar cell built-in panels aligned on a straight line are connected in common to the parallel positive current collecting bus and negative current collecting bus, respectively, and the positive current collecting bus is connected. , And the solar cell power is extracted from each of the negative-side current collecting buses.

According to a sixth aspect of the present invention, in the solar cell power generation system according to the fourth or fifth aspect, the positive-side current collecting bus and the negative-side current collecting bus are installed on an eaves side of the roof.

According to a seventh aspect of the present invention, in the solar cell power generation system according to the fourth or fifth aspect, the positive current collecting bus and the negative current collecting bus are installed on the ridge side of the roof.

In the solar cell power generation system according to claims 4 to 7, a large number of solar cell built-in panels are installed on the roof,
In addition, it is possible to simplify the work of installing a current collection bus and connecting the final stage solar cell built-in panel to the current collection bus.

[0015] That is, in parallel with the eaves front side, respectively, the linear plus and minus current collecting buses are installed in parallel,
On the other hand, the solar cell mounting panels in the first row are fixed so that the plus terminal and the negative terminal located on the lower side of the panels are in contact with each other. By constructing the panels, it is possible to collect the power generated by the solar cell modules installed in all the solar cell built-in panels from these positive side current collecting bus and negative side current collecting bus. It becomes.

According to an eighth aspect of the present invention, in the solar cell power generation system according to any one of the fourth to seventh aspects, the positive side current collecting bus and the negative side current collecting bus are integrated with each other via an insulating material. Since it is used, the handling of the current collection bus becomes easy and the construction can be further simplified.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a solar cell built-in panel according to a first embodiment of the present invention. The solar cell built-in panel 1 of this embodiment includes a slate panel main body 2
The structure is such that the solar cell module 3 is incorporated in the lower half working allowance 2D, which is exposed to sunlight when the roof is installed. The lower half of the panel body 2 is overlapped with the panel body of the other panel at the four corners of the other panel body 2-1, the upper half of the other panel bodies 2-1 and 2-2, and the lower half of the panel body 2 is overlaid on the upper margin 2U. In the allowance 2D, a pair of a positive terminal and a negative terminal of the solar cell module 3 are provided at each of the two right and left corners on the back side, and conversely, the panel body 2-3 of the other panel that comes to the upper side. In the upper half overlapping allowance 2U in which the lower half working allowance 2D of 2-4 is overlapped from the upper side, at each of the two left and right corners on the surface side,
One positive terminal and one negative terminal of solar cell module 3
Each pair is provided.

The positions of the plus terminal and the minus terminal provided at each of the four corners of the panel main body 2 are one at the upper side or the lower side in a staggered grid arrangement, which is a usual slate tile roofing construction method. This is a position facing the plus terminal and the minus terminal of the solar cell module 3 provided in the overlapping portion of another panel body overlapping by / 4. The positional relationship between the plus terminal and the minus terminal forming a pair at each of these positions is at least the width W of each terminal.
An offset δ is provided by being shifted in the vertical direction by a dimension D that is larger than D.

By doing so, when the roofing is performed in the same manner as the usual roofing work of the slate tile, the solar cell module 3 incorporated in each of the panels 1 is overlapped between the panels 1 which are overlapped in front, back, left and right. The positive terminal and the negative terminal are naturally in contact with each other from above and below, and a large number of solar cell modules 3 incorporated in each panel body 2
The solar cell power generation system can be configured such that the solar cell power generation systems are connected in parallel in the entire roof or in each of the divided areas.

When installing on a roof, FIGS. 2 and 3
As shown in the above, the positive terminal of the solar cell built-in panel 1,
A collector bar 13 consisting of a plus-side collector bus 11 and a minus-side collector bus 12 integrated with an insulating band 10 therebetween is laid at a distance substantially equal to the distance δ between the minus terminals. Then, the solar cell built-in panel 1 in the first row on the eaves side is constructed thereon. As a result, two pairs of left and right plus terminals and minus terminals provided on the back side of all working allowances 2D of the solar cell built-in panel 1 in the first row are respectively a plus-side collecting bus 11 and a minus-side collecting bus. 1
2 are connected in parallel with each other (in FIG. 2, the solar cell built-in panel 1 in the first row is The circuit wiring of the module 3 is partially omitted).

Next, the circuit configuration of the solar cell module 3 will be described. FIG. 4 shows a circuit of the solar cell module 3 incorporated in the solar cell built-in panel 1. The solar cell module 3 connects a large number of solar cells 4 in series or in parallel, connects a DC / DC converter 5 to each output terminal of a minus pole and a plus pole of the module 3 as a unit, and outputs a DC voltage of a predetermined voltage. And a plus terminal that is branched out from each of the minus output and plus output of the DC / DC converter 5,
Negative terminals are arranged in pairs at each of the four corners of the solar cell built-in panel 1 described above.

Here, DC / D is applied to each solar cell module 3.
The reason for providing the C converter 5 is that the output of the solar cell module is usually about 20 W, which is incorporated in one slate tile-like panel 1, and the solar cell module 3 incorporated in many panels 1 Are connected in parallel to extract DC power, the current capacity is large and Joule loss is large. Therefore, by providing a step-up DC / DC converter 5 in each solar cell module 3, for example,
This is because the electromotive voltage of about 3 V is boosted to about 300 V, and the current capacity is reduced to take out.

FIG. 5 shows a circuit configuration of the DC / DC converter 5 in one solar cell module 3. D
The C / DC converter 5 includes a capacitor 51 provided for stabilizing a series current of a large number of solar cells 4 incorporated in the panel main body 2, a voltage detector (VDT) 52 for detecting a voltage across the capacitor 51, and a capacitor. The switching device 53 includes a switching element 53 for switching a DC voltage Vo generated at both ends of the switching element 51, a boosting transformer 54 for boosting an alternating current obtained by the switching element 53, a diode 55 for rectifying an output of the boosting transformer 54, and a smoothing capacitor 56. .

Then, in order to control the switching operation of the switching element 53, the control operation unit 61, which has confirmed that the DC voltage V0 detected by the voltage detector 52 is higher than a predetermined voltage, generates a switching signal of the switching element 53. And send. As a result, the voltage Vout detected by the voltage detector 59 detecting the voltage generated at the output, the current Iout detected by the current detector 60 similarly detecting the current flowing to the output, and the two values are used. The power calculation unit 58 obtains the output power, and the control circuit 61 has a function of correcting the switching signal and sending it to the switching element 53 so that the obtained output power is maximized. Note that this DC /
The voltage conversion by the DC converter 5 only needs to be performed when the solar cell is actually working, that is, only during the time when sunlight is being received.
Reference numeral 8 uses the power generated by the group of solar cells 4 as a power source.

FIG. 6 shows the connection relationship of the solar cell module 3 group when roofing is performed by the solar cell built-in panel 1 incorporating the solar cell module 3. In FIG. 6, the same applies to FIGS. 1 to 3, but the entire solar cell module 3 is indicated by the symbol of one battery, but this applies to the entire circuit configuration illustrated in FIGS. 4 and 5. It is shown.

The solar cell power generation system shown in FIG.
As shown in FIG. 1, the DC / AC converter 8 converts 50 Hz or 60 Hz, 1
A connection is made to convert the power into 00 V or 200 V AC power and supply it to the load 9.

In such a solar cell power generation system, in the case where a connection failure occurs between the positive electrode and the negative electrode in the hatched portion A in FIG. 6, a bypass path indicated by a chain line B and a broken line C is provided. , The positive electrode and the negative electrode are connected to each other at the same potential, and the portion of the solar cell module 3 where the contact failure occurs has occurred.
Power can be taken out without waste.

In the first embodiment,
Although the DC / DC converter 5 serving as a power converter is mounted on the output side of the solar cell module 3, a DC / AC converter (inverter) is used instead.
May be adopted to output AC power.
And in that case, AC for conversion to indoor power
/ AC converter will be employed.

In the above embodiment, the current collecting bar 13
Was installed at a position in contact with the solar cell built-in panel 1 in the first row on the eaves front side, but the present invention is not limited to this, and it may be configured to be fixed to the front side of the last row on the ridge side.

Next, a solar cell built-in panel and a solar cell power generation system using the same according to a second embodiment of the present invention will be described with reference to FIGS. The solar cell built-in panel 1 according to the second embodiment is different from a conventional Japanese tile (or western tile) in that a solar cell is used for a panel body 2 that is laid in a grid pattern in a vertical and horizontal manner. The module 3 is incorporated, and each panel body is incorporated into each of the overlap margins of the four sides 2T, 2B, 2L, and 2R overlapping with the other panel bodies 2-1, 2-2, 2-3, and 2-4. The other panel body 2-3, so that the plus terminal and the minus terminal between the solar cell modules 3 are in natural contact with each other.
In the overlapping margin of the upper side 2T and the right side 2R that are superimposed on the lower side of 2-4, the other panel main bodies 2-1, 2-
The lower side 2B and the left side 2L, which are superposed on the upper side of the panel body 2, are on the back side and other panel main bodies 2-1, 2-2, 2-3, 2
-4 is a structure provided at a position where it comes into contact with each terminal of the same polarity up and down.

Further, the positive terminal and the negative terminal forming a pair on each of the four sides are offset in the vertical direction by at least a dimension D larger than the width W of each terminal, as in the first embodiment. It has δ.

As shown in FIG. 9, in the solar cell built-in panel 1 according to the second embodiment, before the first row on the eaves side is constructed, the current collecting bar 13 is placed in parallel with the eaves side. It is installed, and then it is roofed vertically and horizontally like a regular Japanese tile or Western tile. Thus, a solar cell power generation system in which a large number of solar cell modules 3 incorporated in each panel body 2 are connected in parallel on the entire roof or on all of the divided areas can be configured. Then, the generated power of the power generation system is taken out by the current collecting bar 13.

Thus, in the case of the second embodiment as well, the solar cell power generation system having the circuit shown in FIGS. 6 and 7 can be constructed similarly to the first embodiment. Even if one or a plurality of solar cell modules 3 is disconnected or has a poor contact, another solar cell module 3
Can be connected between all of the healthy solar cell modules 3, and the power generated by each solar cell module can be used effectively.

In the second embodiment as well, the circuit configuration of the solar cell module 3 can employ an inverter as the power converter, as in the first embodiment.

[0035]

According to the solar cell built-in panel according to the first to third aspects of the present invention, the solar cell built-in panel is installed on the roof in a houndstooth check pattern or in a checkerboard pattern, so that each panel has a front, rear, left and right. Between the overlapping panels, the positive and negative terminals between the solar cell modules incorporated in each panel naturally contact each other, and many solar cell modules installed in each panel body are all connected in parallel on the entire roof It is possible to configure a solar cell power generation system in a state in which the solar cell module is disconnected, and even if one or more of the solar cell modules is disconnected or has a poor contact, the solar cell module is bypassed and a healthy All the solar cell modules can be connected, and the power generated by each solar cell module can be used effectively.

Further, the installation positions of the plus terminal and the minus terminal provided on each of four sides or four corners of each panel main body are shifted from each other by more than the width of each terminal. In order to take out the generated power, if a straight positive current collecting bus and a negative current collecting bus are installed in parallel to the solar panel row The positive terminal and the negative terminal of each solar cell panel in the stage can be brought into contact with the common positive-side current collecting bus and the negative-side current collecting bus, respectively, in an electrically parallel state, thereby simplifying the current collecting structure.

According to the solar cell power generation system of the present invention, a plurality of solar cell built-in panels are installed on the roof, and a current collecting bus is installed, so that the solar cell built-in panel at the final stage is provided. The operation of connecting the power supply to the current collection bus can be simplified.
In other words, the linear positive and negative current collecting buses are installed in parallel with the eaves front side, and the solar cell built-in panel in the first row is connected to the positive terminal located on the lower side of them. Then, fix the negative terminals so that they are in contact with each other, and then successively construct a large number of solar cell built-in panels toward the building side. It is possible to collect the power generated by the solar cell modules incorporated in all the solar cell built-in panels.

According to an eighth aspect of the present invention, in the solar cell power generation system of the fourth to seventh aspects, the positive side current collecting bus and the negative side current collecting bus are integrated with each other via an insulating material. This makes it easier to handle the current collection bus and further simplifies construction.

[Brief description of the drawings]

FIG. 1 is a plan view of a solar cell built-in panel according to a first embodiment of the present invention.

FIG. 2 is an exploded plan view of a solar cell power generation system using the solar cell built-in panel of the embodiment.

FIG. 3 is an exploded perspective view of a solar cell power generation system using the solar cell built-in panel of the embodiment.

FIG. 4 is a circuit diagram of the solar cell module according to the embodiment.

FIG. 5 is a circuit diagram of a DC / DC converter in the solar cell module according to the embodiment.

FIG. 6 is a circuit diagram of the solar cell power generation system according to the embodiment.

FIG. 7 is a circuit diagram showing a connection state between the solar cell power generation system of the above embodiment and indoor wiring.

FIG. 8 is a plan view of a solar cell built-in panel according to a second embodiment of the present invention.

FIG. 9 is a plan view of a solar cell power generation system using the solar cell built-in panel of the embodiment.

[Description of Signs] 1 Solar cell built-in panel 2,2-1,2-3,2-3,2-4 Panel body 2U Overlap allowance 2D Work allowance 3 Solar cell module 4 Solar cell 5 DC / DC converter 8 DC / AC converter 9 Load 10 Insulation band 11 Positive side current collecting bus 12 Minus side current collecting bus 13 Current collecting bar 100 Commercial power supply

Continued on the front page (72) Inventor Masao Isshiki 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Inventor Tsuneka Tsuchiya 1-1-1, Shibaura, Minato-ku, Tokyo Toshiba Corporation Inside the head office (72) Inventor Takuo Ono 1-1-1, Shibaura, Minato-ku, Tokyo Inside the Toshiba head office (72) Inventor Eiichiro Fujii 336 Tatehara, Fuji City, Shizuoka Prefecture Inside the Toshiba Fuji Plant (72) Invention Person Yutaka Sada 1 Toshiba-cho, Komukai-shi, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba R & D Center (72) Inventor Tatsuaki Security 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Fuchu Plant F-term (reference) 2E108 AS01 AZ01 BB01 BN01 DD05 GG16 5F051 BA03 EA01 EA17 FA14 JA02 JA06 JA08

Claims (8)

[Claims] 1. A solar cell module is built in a tile-like panel main body, and each of a positive terminal and a negative terminal of the solar cell module overlaps with another panel main body of the panel main body at each of four sides or four corners. The lower part of the panel body is the upper side, the upper part of the other panel body is the lower side, and the same polarity terminals of the solar cell module incorporated in the other panel body. It is a solar cell built-in panel provided in a pair at the position where it contacts up and down, the installation position of the plus terminal and the minus terminal provided on each of four sides or four corners of the panel body, front and rear or left and right A solar cell built-in panel, which is shifted by a distance larger than each terminal width. 2. The panel body is slate tile-like,
The solar cell built-in panel according to claim 1, wherein a plus terminal and a minus terminal of the solar cell module are provided at four corners overlapping with another panel body. 3. The panel main body is a tile-like or Japanese-style tile, and each of a positive terminal and a negative terminal of the solar cell module is provided on each of four sides overlapping with another panel main body. 2. The solar cell built-in panel according to 1. 4. A solar cell power generation system in which a large number of the solar cell built-in panels according to claim 1 or 2 are installed on a roof in a staggered grid pattern, wherein a plurality of solar cells are electrically connected to a final stage. The positive terminal and the negative terminal of each of the solar cell built-in panels arranged on the line are commonly connected to the parallel positive current collecting bus and negative current collecting bus, respectively. A solar cell power generation system characterized by extracting solar cell power from each electric bus. 5. A solar cell power generation system in which a large number of the solar cell built-in panels according to claim 1 or 3 are constructed in a grid pattern on a roof, wherein the plurality of panels are electrically arranged at the final stage on a straight line. The positive terminal and the negative terminal of each of the solar cell built-in panels arranged in a row are connected in common to the parallel positive current collecting bus and negative current collecting bus, respectively. A photovoltaic power generation system characterized by extracting photovoltaic power from each bus. 6. The solar cell power generation system according to claim 4, wherein the positive-side current collecting bus and the negative-side current collecting bus are installed on an eaves side of the roof. 7. The solar cell power generation system according to claim 4, wherein the positive side current collecting bus and the negative side current collecting bus are installed on the ridge side of the roof. 8. The power supply system according to claim 4, wherein the positive side current collecting bus and the negative side current collecting bus are integrated with each other via an insulating material. Solar power generation system.