JP3572265B2 - Photovoltaic module, photovoltaic power generation system and construction method thereof - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photovoltaic module, a photovoltaic power generation system, and a method for constructing the photovoltaic module, which can simplify wiring work.
[0002]
[Prior art]
2. Description of the Related Art In recent years, solar power generation systems have rapidly spread, mainly for residential use. However, the market is still dependent on subsidies by the government, and it takes 20 to 30 years to recover capital investment. Therefore, in order for the photovoltaic power generation system to spread in earnest, it is necessary to achieve economic efficiency that can compete with existing power sources. The main components of a photovoltaic power generation system are a solar cell module, a gantry, and a power conditioner. For solar cell modules, cost reductions can be expected by introducing thin-film solar cells with excellent mass productivity. It is possible to omit it by adopting the power conditioner, and the cost reduction of the power conditioner is expected by mass production. In this way, efforts to reduce the cost of equipment are beginning to bear fruit. On the other hand, the construction cost includes installation work and electrical work. With regard to the installation work, the installation work of the solar cell module is included in the installation work of the building material main body by integrating the building materials, so that the cost can be reduced. However, much less work has been done on electrical work. In particular, in the case of a roof material integrated type which is promising for residential use, it is preferable to lay small-area solar cell modules without gaps in order to effectively utilize a complicated roof shape.
[0003]
[Problems to be solved by the invention]
First,5 and 6The case where a 3 kW power generation system is constructed using a crystalline silicon solar cell module having an effective power generation area of 20 cm × 100 cm, a power generation output of 25 W, and an operation voltage of 10 V will be described with reference to FIG.
FIG.As shown in the figure, the 3 kW power generation system uses 120 solar cell modules 2 each having a capacity of 25 W. Since the input voltage of the power conditioner 8 is set to about 200 V, the output is achieved by dividing the 120 modules 2 into six groups and connecting the 20 modules 2 belonging to each group G1 to G6 in series. A voltage of 200 V is obtained. The output terminals from the six groups G1 to G6 are connected in parallel in the connection box 6, and these are integrated into a pair of output extraction cables 41 and 42, and the terminals of the output extraction cables 41 and 42 are further connected to the power conditioner 8. To the positive and negative terminals of
[0004]
In such a system,FIG.As shown in (1), since it is necessary to perform the construction in units of 20 sheets per group, there arises a problem that the layout design and wiring design of the solar cell module 2 on the roof surface 1 and the construction are complicated. IeFIG.As shown by the chain double-dashed line therein, although there are spaces on the roof surface 1 for installing another 250 modules for 250 W, the part 9 that cannot be installed because it is necessary to configure 20 This causes inconvenience that no module can be installed on a small roof surface where only 19 modules can be installed.
[0005]
next,7, 8, and 10A description will be given of an example in which a 3 kW system is constructed using a thin-film silicon-based solar cell module having an effective power generation area of 20 cm × 100 cm, a power generation output of 15 W, and an operation voltage of 30 V, with reference to FIG.
[0006]
When a 3 kW power generation system is constructed using one 15 W module, the required number of modules is 200 in a simple calculation. However, since the voltage per sheet is 30 V, if the power conditioner input voltage is set to 210 V, it is necessary to connect seven modules in series, and the total number of modules must be a multiple of seven. Therefore, the total number of modules is 203, which is the minimum multiple of 7 which is 200 or more. The 203 sheets are divided into 29 groups, and 7 sheets per group are connected in series to obtain an output voltage of 210V.
[0007]
FIG.FIG. 1 is a wiring diagram showing the internal wiring of a conventional thin-film solar cell module. The module 2 is a module for connecting the positive and negative electrodes 21 and 22 to the terminals of the positive and negative cables 51 and 52, respectively. It has internal wirings 37 and 38 and a terminal box 36 having terminal box internal wirings 30 and 31. The wiring 37 in the module on the positive electrode side and the wiring 30 in the terminal box are connected at a connection portion 39 soldered or the like, and the wiring 38 in the negative electrode side and the wiring 31 in the terminal box are connected to a connection portion 39 soldered or the like. Connected.
[0008]
FIG.As shown in the figure, the output terminals from the 29 groups G1 to G29 are connected in parallel in the junction box 6, these are collected into a pair of output extraction cables 41 and 42, and the output extraction cables 41 and 42 are further connected to power. Connect to conditioner 8.FIG.Each module 2 is connected to a pair of positive and negative cables 4 as shown in FIG. In such a conventional power generation system, a total of 58 cables consisting of 29 pairs of positive and negative cables are laid on the roof surface 1, these are collectively brought together at one location on the roof surface, and each cable terminal is drawn into the junction box 6. In parallel. For this reason, the volume of the lead-in cable increases, and the number of connecting portions 7 in the connection box 6 increases, so that the connection work becomes very complicated.
[0009]
The present invention solves the above-mentioned problems, and simplifies the layout design and wiring design of the solar cell modules on the roof surface, and simplifies the construction thereof, allows the roof surface to be effectively used, and enables the roof surface having a small area to be used. An object of the present invention is to provide a photovoltaic module, a photovoltaic power generation system, and a method for constructing the photovoltaic module, which can be constructed, further reduce the cable volume, and simplify the connection work in the connection box. .
[0010]
[Means for Solving the Problems]
The solar cell module according to the present invention is a solar cell module used in a solar power generation system including wiring for connecting a plurality of solar cell modules in parallel to aggregate power generation output,In a solar cell module used for a photovoltaic power generation system including wiring for connecting a plurality of solar cell modules in parallel to aggregate power generation output, a rectangular substrate, and a positive electrode provided on one side of the rectangular substrate, A negative electrode provided on the other side of the rectangular substrate; a positive electrode module wiring connected to the positive electrode; a negative module module wiring connected to the negative electrode; and two terminals provided between the positive and negative electrodes A box, a wiring provided in one of the two terminal boxes, connected to the wiring in the positive electrode module, and branched into two, and provided in the other of the two terminal boxes. The wiring in the terminal box for the negative electrode is connected to the wiring in the module for the negative electrode, and the wiring in the terminal box for the positive electrode and the terminal for the negative electrode are taken out in order to take out the two terminals of the negative electrode and the two terminals of the negative electrode. Characterized by comprising an output take-out cable positive and negative two pairs respectively connected to the box in the line, the.
[0011]
In the present invention, the solar cell modules to be installed are grouped into groups each obtained by dividing the input voltage of the power conditioner by the voltage per solar cell module, and all the solar cell modules in each group are connected in parallel. A plurality of groups that generate the same current and voltage. The plurality of groups are connected in series to obtain a power conditioner input voltage, collect power generation output, and connect to the power conditioner. Further, the present inventors can reduce the number of groups by using the high-voltage solar cell module disclosed in the application specification and the drawings of Japanese Patent Application No. 2000-293958. As a solar cell module that realizes such a connection, a circuit including a parallel connection unit is provided inside the solar cell module in order to simplify the parallel connection operation in each group.
[0012]
Specifically, the positive electrode and the negative electrode are branched into two each by the wiring in the module and the wiring in the terminal box attached to the module, and the parallel connection can be made by connecting the positive electrode and the negative electrode of the adjacent module. I do.
[0013]
In this case,It is preferable to attach a backflow prevention diode to at least one of the two terminal boxes.
[0014]
Further, the pair of positive and negative output output cables led out of the terminal box may be a pair of positive and negative two-core cables integrated with each other in an insulated state.
[0015]
In addition, a pair of positive and negative connectors attached to the tip of a pair of positive and negative output extraction cables led out of the terminal box for connection with a solar cell module arranged adjacent to each other are integrated while being insulated from each other. A pair of positive and negative two-core connectors may be used.
[0016]
Further, the two pairs of positive and negative output lead-out cables led out of the terminal box may be constituted by two pairs of positive and negative two-core cables integrated in a state insulated from each other.
[0017]
Furthermore, a pair of positive and negative connectors respectively attached to the tips of two pairs of positive and negative output extraction cables led out of the terminal box for connection with the solar cell module arranged adjacently are insulated from each other. A pair of positive and negative two-core connectors may be integrated.
[0018]
The solar power generation system according to the present invention,A solar power generation system configured using the plurality of solar cell modules, wherein the plurality of solar cell modules are respectively connected to the output extraction cables so as to form a parallel circuit, and wiring that aggregates power generation output And a connection box having a connecting portion to which the wiring is connected, and a power conditioner connected to the connection box and supplying power to a load with a power generation output.
[0019]
A method for constructing a photovoltaic power generation system according to the present invention is a method for constructing the above-mentioned photovoltaic power generation system using the above-mentioned solar cell module, and comprises a pair of positive and negative outputs at one end of each group. Connect the extension cable to the extraction cable,The parallel connection of each group, or the series connection of each group, or the parallel and series connection of each group, at least one of waterproof and insulated to a pair of positive and negative output extraction cable at the other end Perform terminal processingIt is characterized by the following.
[0020]
In the present invention, since the wiring portions connected in parallel are provided inside the solar cell module, the layout design and wiring design of the solar cell module on the roof surface and the construction thereof are simplified, and the roof surface can be effectively utilized. Become like In particular, since the solar cell module can be installed on a roof having a small area, it greatly contributes to the spread of the solar power generation system to ordinary households. Further, according to the present invention, since the volume of the cable drawn into the indoor junction box is suppressed, the connection work in the junction box is simplified, and the number of work steps is greatly reduced.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, various preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[0022]
(1st Embodiment)
Referring to FIGS. 1 and 2, as a photovoltaic power generation system according to a first embodiment of the present invention, a 3 kW solar cell module having an effective power generation area of 20 cm × 100 cm, a power generation output of 15 W, and an operation voltage of 30 V is used. A case where a power generation system is constructed will be described as an example.
[0023]
As shown in FIG. 1A, in the solar cell module 2 </ b> A, the positive electrode 21 is disposed closer to one short side of the rectangular substrate 20, and the negative electrode 22 is disposed closer to the other short side of the rectangular substrate 20. The first and second terminal boxes 23 and 24 are disposed between the positive and negative electrodes 21 and 22. The first terminal box 23 is provided near the positive electrode 21, and the second terminal box 24 is provided near the negative electrode 22.
[0024]
The positive electrode 21 and the negative electrode 22 are each branched into two by wirings 25, 29, 32 in the module made of copper foil or the like and wirings 27, 28, 30, 31, 33 in the terminal box.
[0025]
The first and second terminal boxes 23 and 24 are provided to lead the two branched positive and negative terminals to the outside as two pairs of positive and negative output output cables 51 and 52, respectively. .
[0026]
At one end of the first terminal box 23, a pair of positive and negative output extraction cables 51 and 52 are connected to the wirings 28 and 33 in the terminal box, respectively, and likewise extend to the opposite side to one end of the second terminal box 24. Another pair of positive and negative output extraction cables 51 and 52 are connected to the terminal box wirings 30 and 31, respectively. The two pairs of output extraction cables 51 and 52 extend from the main body of the module 2A by a predetermined length, and positive and negative connectors 53 and 54 are attached to the respective ends.
[0027]
By inserting the positive electrode connector 53 of the module 2A into the positive electrode connector 53 of the adjacent module 2A and inserting the negative electrode connector 54 of the module 2A into the negative electrode connector 54 of the adjacent module 2A, the modules 2A are successively connected in parallel. It has become. In this case, it is preferable to prevent the wrong insertion by changing the shape of the connector 53 for the positive electrode and the shape of the connector 54 for the negative electrode.
[0028]
The tangent portions 39 of the module wirings 25, 29, 32 and the terminal box wirings 27, 28, 30, 31, 33 are soldered or crimped.
[0029]
A backflow prevention diode 26 is provided in the first terminal box 23 to prevent a backflow current from flowing to the power generation current of the module 2A. The backflow prevention diode 26 is inserted into the first terminal box wiring 27, one is connected to the positive electrode 21 via the module wiring 25, and the other is connected to the module wiring 29 and the first terminal box wiring 28, Via the wiring 30 in the two terminal boxOutput cableIt is connected to the positive electrode cable 51.
[0030]
In the above embodiment, twoA pair of positive and negative output extraction cables 51 and 52Are led out of the module 2A in two directions, but may be led out of the module 2B in two directions using the positive / negative two-core cable 55 shown in FIG. 1B. That is, the positive electrode core wires 28b, 30b of the positive / negative two-core cable 55 are connected to the module wiring 29 as wiring in the terminal box, respectively, and the negative core wires 31b, 33b of the positive / negative two-core cable 55 are connected to the terminal box wiring in the module. Each is connected to the wiring 32b. In this case, it is preferable to prevent the wrong insertion by changing the shape of the connector 53 for the positive electrode and the shape of the connector 54 for the negative electrode.
[0031]
Next, the photovoltaic power generation system of the present embodiment will be described with reference to FIG.
When the above solar cell module 2A is used for the roof surface 1 of a house, the number of modules required for constructing the 3 kW power generation system 10A is 200 in simple calculation. However, since the voltage per module is 30 V, if the power conditioner input voltage is set to 210 V, the required number of series is 7, and the total number of modules is 200 or more, which is the minimum multiple of 7 and is 203.
[0032]
The 203 solar cells are divided into seven groups, and 29 solar cell modules 2A per group are connected in parallel by connecting the positive electrodes and the negative electrodes of adjacent modules. Thus, seven groups 3a to 3g in which 29 modules 2A are connected in parallel are formed.
[0033]
One pair of positive and negative terminals at one end of each of the groups 3a to 3g are guided to the connection box 6 by extension cables 4a to 4g, and terminals of another group are connected in series in the connection box 6 so that the groups 3a to 3g are connected in series. Connected to That is,As aggregate wiringThe extension cables 4a to 4g are drawn into the room from the roof surface 1 and collected in the connection box 6, and each cable terminal is connected to a terminal of an internal circuit of the connection box. Inside the connection box 6, connection portions 7a to 7n for connecting the cables 4a to 4g from the groups 3a to 3g to the output extraction cables 41 and 42 are arranged in series. Since the connection portions 7a to 7n are arranged neatly in the connection box 6 as described above, it is difficult for the connection box side and the cable side to be mistakenly connected.
[0034]
On the other hand, the connectors of the pair of positive and negative terminals at the other end of each of the groups 3a to 3g are covered with a waterproof insulating cap 59 and cured.
[0035]
A pair of positive and negative output extraction cables 41 and 42 are extracted from the output side of the connection box 6 and connected to the input side of the power conditioner 8. Further, the output side of the power conditioner 8 is connected to a home AC system or a commercial AC system.
[0036]
According to the power generation system 10A of the present embodiment, the conventional crystal-type modules need to be allocated to the roof surface in 20 groups per group, whereas the total number of modules is designed to be a multiple of seven. There is the advantage that only care has to be taken and the design and construction are simplified.
[0037]
In the conventional thin-film module,FIG.As shown in the above, 29 groups of 7 groups in a group are connected in series, and 29 pairs of positive and negative leads derived from the 29 groups, all 58 cables are laid on the roof surface, brought together in one place and led indoors and connected The parallel connection in the box increases the volume of the cable and complicates the connection work in the connection box. On the other hand, according to the present embodiment, a total of 14 extension cables are laid in 7 groups in 7 pairs. The connection operation in the connection box is also performed in a series connection of seven pairs of positive and negative, and the design and construction are simplified. That is, the number of cables brought into the connection box 6 is considerably smaller than that of the related art, so that the connection work in the connection box 6 is greatly reduced.
[0038]
In this embodiment, since a part connected in parallel to the solar cell module itself is included as an internal circuit, it is preferable to incorporate a backflow prevention diode in a terminal box attached to the solar cell module.
[0039]
Further, since the solar power generation system according to the present invention does not include a series connection of solar cell modules, it is possible to use a two-core connector in which a pair of positive and negative electrodes is integrated for connection with adjacent modules. The number of man-hours can be reduced from two positive / negative to one positive / negative.
[0040]
In addition, it is preferable that the connector used for connection with the adjacent module be different in color between positive and negative or display a positive or negative sign in order to prevent incorrect insertion of positive and negative. Further, it is preferable that the positive connector and the negative connector are formed in different shapes so that an incorrect insertion between the positive and negative electrodes becomes impossible.
[0041]
(Second embodiment)
Referring to FIG. 3, as a solar power generation system according to the second embodiment of the present invention, a 3 kW power generation system using a solar cell module having an effective power generation area of 20 cm × 100 cm, a power generation output of 15 W, and an operation voltage of 100 V The case of construction will be described as an example.
[0042]
As the solar cell module 2A of the present embodiment, the high voltage solar cell module disclosed by the present inventors in the application specification and drawings of Japanese Patent Application No. 2000-293958 is used. The module 2A of the present embodiment is provided with two terminal boxes for branching a positive electrode and a negative electrode into two each by wiring using a copper foil or the like in the module in the same manner as in the first embodiment, and leading out a pair of positive and negative terminals. , With a built-in parallel connection circuit.
[0043]
When such a module 2A is used for the roof surface 1 of a house, the number of modules required for constructing the 3 kW power generation system 10B is 200 in a simple calculation. When the power conditioner input voltage is 200 V, the required series number is 2 because the module operating voltage is 100 V. Therefore, all modules may be divided into even groups (= 2, 4, 6, 8,..., 2n). In this embodiment, the modules are divided into the minimum number of two groups.
[0044]
100 modules 2A per group are connected in parallel by connecting the positive electrodes and the negative electrodes of adjacent modules. In the connection part 5 of the adjacent module 2A, the positive connectors 53 are inserted and the negative connectors 54 are inserted as shown in FIG. Since the connectors 53 and 54 have a structure in which pins are inserted into a socket, for example, they can be easily connected on site. Thereby, two groups 3a and 3b in which 100 modules 2A are connected in parallel are formed.
[0045]
One pair of positive and negative terminals at one end of the two groups 3a and 3b are guided to the junction box 6 by extension cables 4a, 4b, 4c and 4d, and are connected in series in the junction box 6. That is, the terminal of the positive-side cable 4a of the first group 3a is connected to the connection portion 7a, the terminal of the negative-side cable 4b is connected to the connection portion 7b, and the terminal of the positive-side cable 4c of the second group 3b is connected to the connection portion. The two groups 3a and 3b are connected in series by connecting the terminal of the negative electrode side cable 4d to the connection portion 7d to 7c. On the other hand, the connectors of the pair of positive and negative terminals at the other ends of the two groups 3a and 3b are respectively covered with a waterproof insulating cap 59 and cured.
[0046]
According to the present embodiment, in the first embodiment, the total number of modules needs to be a multiple of 7, but the total number of modules may be an even number, and the design and construction of the power generation system are further simplified. You.
[0047]
Furthermore, according to the present embodiment, in the above-described first embodiment, seven pairs of positive and negative cables were laid in seven groups, and a total of 14 extension cables had to be laid, and a serial connection of seven pairs of positive and negative cables had to be performed in the connection box. It is only necessary to lay two pairs of positive and negative extension cables in two groups, and to connect two pairs of positive and negative series in a connection box, further simplifying the design and construction.
[0048]
In addition, since this embodiment also includes a portion where the solar cell modules are connected in parallel, it is preferable to incorporate a backflow prevention diode in a terminal box attached to the solar cell module or the like.
[0049]
Further, since the solar power generation system according to the present invention does not include a series connection of solar cell modules, it is possible to use a two-core connector in which a pair of positive and negative electrodes is integrated for connection with adjacent modules. The number of man-hours can be reduced from two positive / negative to one positive / negative.
[0050]
In addition, it is preferable to change the color of the connector used for connection with the adjacent module or to display the sign of the sign in order to prevent incorrect insertion of the sign. Furthermore, it is preferable that incorrect insertion is impossible by changing the shape of the connector for the positive electrode and the shape of the connector for the negative electrode.
[0051]
(Third embodiment)
FIG.(A) and (b) of the present inventionThird embodimentWill be described.
The solar cell module 2 according to the present embodiment is configured to prevent connection errors between the positive electrode wiring and the negative electrode wiring,FIG.As shown in FIG. 3A, pins 56c and 56d are provided on one positive connector 56a and negative connector 56b, and sockets 57c and 57d are provided on the other positive connector 57a and negative connector 57b. The positive electrode pin 56c is thicker and shorter than the negative electrode pin 56d, and the positive electrode socket 57c is shallower and larger in diameter than the negative electrode socket 57d. The positive electrode pin 56c has a shape that can be inserted and connected only to the positive electrode socket 57c, and has a shape that cannot be inserted into the negative electrode socket 57d. The negative electrode pin 56d has a shape that can be inserted and connected to only the negative electrode socket 57d, and cannot be inserted into the positive electrode socket 57c.
[0052]
Similarly, in the module having the positive / negative two-core cable 55,FIG.(B), a pair of positive and negative pins 56c and 56d are provided on one connector 56A, and one positive and negative socket 57c and 57d are provided on the other connector 57A. The positive electrode pin 56c is thicker and shorter than the negative electrode pin 56d, and the positive electrode socket 57c is shallower and larger in diameter than the negative electrode socket 57d. The positive electrode pin 56c has a shape that can be inserted and connected only to the positive electrode socket 57c, and has a shape that cannot be inserted into the negative electrode socket 57d. The negative electrode pin 56d has a shape that can be inserted and connected to only the negative electrode socket 57d, and cannot be inserted into the positive electrode socket 57c.
[0053]
According to the present embodiment, the positive pin / socket and the negative pin / socket have completely different shapes, so that it is possible to completely prevent incorrect connection between the positive and negative electrodes.
[0054]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, layout design and wiring design of a solar cell module to a roof surface, and its construction are simplified, and it becomes possible to utilize a roof surface effectively. In particular, since it becomes possible to install a solar cell module even on a roof having a small area, it can greatly contribute to the spread of a solar power generation system to ordinary households.
Further, according to the present invention, since the volume of the cable drawn into the indoor junction box is suppressed, the connection work in the junction box can be simplified and easily performed, and the number of work steps can be greatly reduced. You.
[Brief description of the drawings]
FIG. 1A is a wiring diagram showing internal wiring (using a single-core cable) of a solar cell module according to an embodiment of the present invention, and FIG. 1B is an internal wiring of a solar cell module according to an embodiment of the present invention ( FIG. 10 is a wiring diagram showing a modified example using a positive and negative two-core cable).
FIG. 2 is a block plan view showing the photovoltaic power generation system according to the embodiment of the present invention.
FIG. 3 is a block plan view showing the photovoltaic power generation system according to the embodiment of the present invention.
FIG. 4(A) is a diagram illustrating a connector portion (using a single-core cable) of the solar cell module according to the embodiment of the present invention, and (b) is a connector portion (positive / negative two-core cable) of the solar cell module according to the embodiment of the present invention. FIG.
FIG. 5FIG. 9 is a wiring diagram showing internal wiring (using a single-core cable) of a conventional solar cell module.
FIG. 6FIG. 4 is a block plan view showing a conventional photovoltaic power generation system (using 20 crystalline solar cell modules per group).
FIG. 7FIG. 9 is a wiring diagram showing internal wiring (using a single-core cable) of a conventional solar cell module.
FIG. 8FIG. 9 is a block plan view showing a conventional photovoltaic power generation system (using seven thin-film solar cell modules per group).
FIG. 9(A) is a diagram (using a single-core cable) for explaining the connection and terminal processing of the modules of the solar cell module according to the embodiment of the present invention, and (b) is a diagram illustrating the modules of the solar cell module according to the embodiment of the present invention. For explaining connection and terminal processing (modification example using positive and negative two-core cables).
FIG. 10The figure explaining connection between modules of the conventional solar cell module, and terminal processing.
[Explanation of symbols]
2, 2A, 2B ... solar cell module,
20 ... substrate,
21 ... Positive electrode,
22 ... negative electrode,
23, 24, 36 ... terminal box,
25, 29, 32, 37, 38, 32b, 29c, 32c ... wiring in the module,
26 ... Backflow prevention diode,
39… Connection part
27, 28, 30, 31, 33, 28b, 30b, 31b, 33b ... wiring in the terminal box,
3a to 3g, G1 to G6, G1 to G29 ... battery group,
4,4a-4g ...Aggregate wiring (Extension cable),
41, 42 ... output extraction cable (extension cable),
5 ... connection part,
51 ...Output cable(Positive cable),
52 ...Output cable(Negative electrode cable),
53, 54, 56a, 56b, 56A, 57a, 57b, 57A ... connectors,
55: Positive / negative two-core cable,
56c, 56d ... pins,
57c, 57d ... socket,
59 ... insulating cap,
6 ... junction box,
7, 7a to 7n: connecting portion (connection portion),
8 ... Power conditioner,
9 ... Part where the effective use of the roof surface is restricted,
10A, 10B ... Solar power generation system.

Claims (10)

In a solar cell module used for a photovoltaic power generation system including wiring for connecting a plurality of solar cell modules in parallel to aggregate power generation output,
A rectangular substrate;
A positive electrode provided on one side of the rectangular substrate,
A negative electrode provided on the other side of the rectangular substrate;
Wiring in the positive electrode module connected to the positive electrode,
Wiring in the negative electrode module connected to the negative electrode,
Two terminal boxes provided between the positive and negative electrodes;
A positive electrode terminal box wiring, which is provided on one of the two terminal boxes and is connected to the positive electrode module wiring and branches into two;
A negative terminal box wiring, which is provided on the other of the two terminal boxes, is connected to the negative electrode module wiring, and branches into two,
Two pairs of output extraction cables connected to the positive terminal box wiring and the negative terminal box wiring, respectively, to take out the positive terminal 2 and the negative terminal 2;
A solar cell module comprising: The solar cell module according to claim 1, wherein at least one of the two terminal boxes includes a backflow prevention diode. 2. The solar cell module according to claim 1, wherein the pair of positive / negative output extraction cables led out of the terminal box is a pair of positive / negative two-core cables integrated in a state insulated from each other. 3. A pair of positive / negative connectors attached to the tip of a pair of positive / negative output extraction cables led out of the terminal box for connection with adjacently disposed solar cell modules are integrated with the positive / negative 1 insulated from each other. The solar cell module according to claim 1, wherein the solar cell module is a pair of two-core connectors. The connector attached to the end of the output cable led out of the terminal box for connection between the solar cell modules is not interchangeable for the positive and negative electrodes to prevent incorrect connection between positive and negative. Item 5. The solar cell module according to any one of Items 1 to 4. The connector attached to the end of the output cable that leads out of the terminal box is used to connect the solar cell modules to each other, making electrical connection by inserting pins into the socket, preventing incorrect connection between positive and negative. 5. The solar cell module according to claim 1, wherein the pin and the socket for the positive electrode and the pin and the socket for the negative electrode are incompatible. A solar power generation system configured using the plurality of solar cell modules according to any one of claims 1 to 6,
Wiring that is connected to the output cable so that the plurality of solar cell modules form a parallel circuit, and aggregates power generation output,
A connection box having a connection portion to which the wiring is connected,
A power conditioner connected to the junction box and supplying a power generation output to a load;
A solar power generation system comprising: By forming a plurality of groups in which a plurality of solar cell modules are connected in parallel and connecting each group in parallel, or connecting each group in series, or connecting each group in parallel and series The photovoltaic power generation system according to claim 7, wherein the power generation outputs of the photovoltaic modules belonging to each group are aggregated and a predetermined output voltage and output current are obtained. The photovoltaic power generation system according to claim 7, wherein parallel connection of each group, series connection of each group, or parallel and series connection of each group is performed in a junction box. A construction method for configuring the photovoltaic power generation system according to any one of claims 7 to 9 using the solar cell module according to any one of claims 1 to 6, wherein An extension cable is connected to the pair of positive and negative output extraction cables at one end to perform parallel connection between the groups, or series connection between the groups, or parallel and series connection between the groups, A method for constructing a photovoltaic power generation system, characterized in that at least one of waterproof and insulating terminal treatment is performed on a pair of positive and negative output extraction cables at the other end.

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