JP2010165993A - Solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an increase in temperature in a terminal box, and to simplify wiring for connecting solar cell groups to bypass diodes. <P>SOLUTION: A solar cell module includes: a first solar cell group 4A for converting light into power; a second solar cell group 4B connected to the first solar cell group 4A in series to convert light into power; a first terminal box 5A; and a second terminal box 5B. A first bypass diode 16A connected to the fist solar cell group 4A in parallel is stored in the first terminal box 5A. Further, a second bypass diode 16B connected to the second solar cell group 4B in parallel is stored in the second terminal box 5B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar cell module constituting a photovoltaic power generation system that converts light, for example, sunlight into electric power.

  In recent years, solar power generation systems have attracted attention as a powerful trump card for global warming prevention measures. This solar power generation system is a system constructed by a solar cell module composed of a solar cell panel and its accessory parts. Nowadays, electric power companies sometimes purchase surplus power from general consumers, and the demand is growing rapidly as a distributed power supply system in each home and office. In particular, in Western Europe, demand for solar cell modules is expected as a leading power system for preventing global warming, and exports from Japan are also increasing.

  When constructing this solar cell module, it is an urgent issue to improve its power generation performance (power generation output), and each company is grinding various ways to achieve this. The solar cell module is created by connecting a plurality of solar cells. And in order to raise electric power generation efficiency, in addition to improving the performance of each photovoltaic cell, the assembly technique is also important.

  As an important element technology for assembling this type of solar cell module, there is a terminal box for connecting solar cell modules. For example, Patent Document 1 describes a technique related to a terminal box device for connecting a solar cell module used for a solar cell module disposed on a roof of a house and a manufacturing method thereof. Patent Document 2 describes a technique related to the structure of a terminal box that is employed when solar cell modules are connected to each other.

  First, a conventional solar cell module will be described with reference to FIGS. FIG. 11 is a plan view showing a conventional solar cell module, FIG. 12 is an explanatory diagram showing an enlarged portion surrounded by a dotted line M of the conventional solar cell module shown in FIG. 11, and FIG. It is explanatory drawing which shows the electrical connection relationship of a battery module.

  The conventional solar cell module 100 shown in FIGS. 11 to 13 includes a solar cell panel 104 having three solar cell groups 101A, 101B, and 101C, and a terminal box 102 (see FIG. 13). The solar cell panel 104 is formed in a rectangular flat plate shape.

  The first solar cell group 101 </ b> A is disposed on one side in the short direction of the solar panel 104, and the second solar cell group 101 </ b> B is disposed on the other side in the short direction of the solar panel 104. Yes. The third solar cell group 101 </ b> C is arranged at the approximate center of the solar cell panel 104 in the short direction.

  The first solar cell group 101A is configured by arranging two solar cell rows 101a in the lateral direction. This solar cell row 101 a is configured by arranging nine solar cells 101 in the longitudinal direction of the solar panel 104 with their light receiving surfaces facing in the same direction. Cell arrays of solar cells such as this solar cell array 101a are generally referred to as strings. Nine solar battery cells 101 constituting the solar battery cell row 101 a are connected in series by two wirings 103. Further, the two solar cell rows 101a are connected in series via ribbon wirings 106 arranged at both ends in the longitudinal direction of the solar cell row 101a.

  In addition, since the 2nd photovoltaic cell group 101B and the 3rd photovoltaic cell group 101C are the structures similar to 101 A of 1st photovoltaic cell groups, the description is abbreviate | omitted. The three solar battery cell groups 101 </ b> A, 101 </ b> B, and 101 </ b> C are connected in series via the ribbon wiring 106. That is, in this conventional solar cell module 100, a solar cell panel 104 composed of 54 solar cells 101 connected in series is used.

  The four ribbon wirings 106 connected to the six solar battery cell rows 101a are gathered at one end. As shown in FIG. 12, the end of the ribbon wiring 106 is bent at a substantially right angle. An insulating member 111 is provided at a location where the four ribbon wirings 106 cross each other, and the insulating member 111 prevents the ribbon wirings 106 from coming into contact with each other and short-circuiting. Furthermore, the insulating member 111 prevents the ribbon wiring 106 and the back electrode of the solar battery cell 101 from coming into contact with each other and causing a short circuit. The ends of the four ribbon wirings 106 are drawn out to the back side of the solar cell panel 104. And the ribbon wiring 106 pulled out to the back side of the solar cell panel 104 is connected to the terminal box 102 (FIG. 13).

  As shown in FIG. 13, the terminal box 102 is provided with four connection terminals 107a, 107b, 107c, and 107d, three bypass diodes 108a, 108b, and 108c, an output positive terminal 109, and a negative terminal 110. ing. The first connection terminal 107 a is electrically connected to the positive terminal 109, and the fourth connection terminal 107 d is electrically connected to the negative terminal 110. Electric power converted by 54 solar cells 101 is output from the positive terminal and the negative terminal.

  The first bypass diode 108a is electrically connected to the first connection terminal 107a and the second connection terminal 107b. The second bypass diode 108b is electrically connected to the third connection terminal 107c and the fourth connection terminal 107d. The third bypass diode 108c is electrically connected to the third connection terminal 107c and the second connection terminal 107b.

  The terminal box 102 is provided with an opening 112 at a position corresponding to the four connection terminals 107a to 107d. The ribbon wiring 106 connected to the three solar battery cell groups 101A to 101C is inserted into the opening 112 of the terminal box 102 and soldered to the corresponding four connection terminals 107a to 107d.

  That is, as shown in FIG. 13, the first bypass diode 108a is connected in parallel with the first solar cell group 101A so as to connect the two solar cell rows 101a. Similarly, the second bypass diode 108b is connected in parallel with the second solar cell group 101B, and the third bypass diode 108c is connected in parallel with the third solar cell group 101C. ing.

  Here, when a failure or the like occurs in one solar cell group, a bypass diode connected in parallel with the solar cell group exhibits a bypass function. That is, the failed solar cell group is electrically bypassed by the bypass diode. And electric power generation is performed by the remaining photovoltaic cell group.

JP 2002-57360 A Japanese Patent Laid-Open No. 11-26035

  However, in the conventional solar cell module, since a plurality of bypass diodes are accommodated in one terminal box, the inside of the terminal box is heated by heat generated from the plurality of bypass diodes. Further, the plurality of bypass diodes may be damaged due to the heat generated by the adjacent bypass diodes. Therefore, the conventional solar cell module needs to increase the size of the heat dissipation mechanism in order to dissipate the heat generated from the plurality of bypass diodes, leading to an increase in the size of the terminal box.

  Moreover, in the conventional solar cell module, a plurality of solar cell groups are connected to one terminal box via connection terminals. Therefore, in the case of the solar cell group arranged far from the terminal box, the length of the wiring (ribbon wiring) that connects the bypass diode housed in the terminal box and the solar cell group becomes long. Furthermore, as the number of solar cell groups increases, the wiring becomes complicated, and it is necessary to provide an insulating member for preventing a short circuit at a location where the wiring intersects. As a result, the conventional solar cell module has a problem that the alignment of the wiring becomes complicated and the number of parts of the insulating member increases.

  An object of the present invention is to provide a solar cell module that can suppress the temperature in the terminal box from rising and can simplify the wiring connecting the solar cell group and the bypass diode in consideration of the above problems. There is to do.

  In order to solve the above problems and achieve the object of the present invention, a solar cell module of the present invention is connected in series with a first solar cell group that converts light into electric power, and the first solar cell group. And the 2nd photovoltaic cell group which converts light into electric power is provided. Further, a first terminal box having a first bypass diode connected in parallel with the first solar cell group, and a second terminal diode having a second bypass diode connected in parallel with the second solar cell group. And 2 terminal boxes.

  According to the solar cell module of the present invention, a plurality of bypass diodes are divided into a plurality of terminal boxes. As a result, the heat (generation) source stored in one terminal box is reduced, and an increase in temperature in the terminal box can be suppressed. For this reason, since a thermal radiation mechanism can be made small, size reduction of a terminal box can be achieved. Furthermore, it is possible to simplify the wiring connecting the solar cell group to the bypass diode.

It is a top view which shows the example of embodiment of the solar cell module of this invention. It is a rear view which shows the example of embodiment of the solar cell module of this invention. It is sectional drawing which shows the solar cell panel which concerns on the example of embodiment of the solar cell module of this invention. It is sectional drawing explaining the attachment state of the solar cell panel and frame which concern on the embodiment of the solar cell module of this invention. It is a top view which expands and shows the location enclosed with the dotted line S shown in FIG. It is a top view which expands and shows the location enclosed with the dotted line T shown in FIG. It is a schematic diagram explaining the connection state of the terminal box and wiring which concern on the embodiment of the solar cell module of this invention. It is a top view which shows the 1st terminal box or 2nd terminal box which concerns on the example of embodiment of the solar cell module of this invention. It is a top view which shows the 3rd terminal box which concerns on the example of embodiment of the solar cell module of this invention. It is a block diagram which shows the circuit structure which concerns on the example of embodiment of the solar cell module of this invention. It is a top view which shows the conventional solar cell module. It is a top view which expands and shows the location enclosed with the dotted line M shown in FIG. It is a block diagram which shows the circuit structure of the conventional solar cell module.

  Hereinafter, embodiments of the solar cell module of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure. The present invention is not limited to the following form.

1. Embodiment of Solar Cell Module First, the configuration of an embodiment of a solar cell module of the present invention (hereinafter referred to as “present example”) will be described with reference to FIGS.
FIG. 1 is a plan view showing a solar cell module of this example, FIG. 2 is a rear view of the solar cell module of this example, and FIG. 3 is a cross-sectional view showing a solar cell panel according to the solar cell module of this example. FIG. 4 is a cross-sectional view showing a solar cell panel and a frame body according to the solar cell module of this example. 5 and 6 are enlarged plan views showing a portion surrounded by dotted lines S and T shown in FIG.

[Configuration example of solar cell module]
A solar cell module 1 shown in FIGS. 1 and 2 includes a flat solar cell panel 2, a frame 3 surrounding the solar cell panel 2, and three terminals arranged on the back side of the solar cell panel 2. Boxes 5A, 5B, 5C.

[Solar panel]
As shown in FIGS. 1 and 3, the solar battery panel 2 includes three solar battery cell groups 4 </ b> A, 4 </ b> B, 4 </ b> C, a back sheet 6, and a transmission glass 9. This solar cell panel 2 is configured by sandwiching 54 substantially rectangular solar cells 4 between a back sheet 6 and a transmission glass 9. Further, a transmissive glass 9 is disposed on the front surface side of the solar battery cell 4, and a back sheet 6 is disposed on the rear surface side of the solar battery cell 4.

  The back sheet 6 is formed in a substantially flat plate shape having a rectangular shape. The color of the back sheet 6 is not particularly limited, but is preferably set to, for example, white in order to reflect light and enter the solar battery cell 4. And as a material of the back seat | sheet 6, the material excellent in light resistance is preferable, for example, a resin film is applied.

  The transmission glass 9 is formed in a substantially flat plate shape and has substantially the same size as the back sheet 6. As the transmissive glass 9, a material excellent in light resistance, moisture resistance and light transmittance is preferable. A material that can also transmit light in the infrared region is more preferable.

  Solar cells 4 are interposed between the back sheet 6 and the transmissive glass 9. A space formed between the solar battery cell 4, the transmissive glass 9 and the back sheet 6 is filled with the filler 11. The filler 11 is preferably made of a material excellent in moisture resistance and light transmittance, like the transmissive glass 9, and for example, ethylene vinyl acetate (EVA) is used.

  Furthermore, as shown in FIG. 1, a frame 3 is attached around the solar cell panel 2. As shown in FIG. 4, the frame 3 is formed in a substantially rectangular parallelepiped shape with a hollow cross-sectional shape. By surrounding the periphery of the solar cell panel 2 with the frame body 3, the solar cell panel 2 is prevented from being damaged by an external impact or the like. The frame 3 is provided with a fixing portion 12 formed in a substantially U-shape. The periphery of the solar cell panel 2 is fitted into the fixing portion 12 via a gasket 13. By interposing the gasket 13 between the solar battery panel 2 and the fixing portion 12, water or the like is provided between the transparent glass 9 and the solar battery cell 4 of the solar battery panel 2 or between the back sheet 6 and the solar battery cell 4. Intrusion can be prevented.

  The first solar cell group 4A is disposed on one side of the back sheet 6 in the short direction, and the second solar cell group 4B is disposed on the other side of the back sheet 6 in the short direction. Yes. In addition, the third solar cell group 4C is disposed in the approximate center of the back sheet 6 in the short direction, that is, between the first solar cell group 4A and the second solar cell group 4B.

  The first solar cell group 4 </ b> A is configured by arranging two solar cell rows 4 a and 4 b in the short direction of the back sheet 6. Similarly, the second solar cell group 4B is configured by arranging two solar cell rows 4c and 4d in the short direction, and the third solar cell group 4C is also configured by two solar cell rows 4e, 4f is arranged in the lateral direction. That is, the six solar cell rows 4 a to 4 f are arranged side by side in the lateral direction of the back sheet 6.

  Since the six solar cell rows 4a to 4f have the same configuration, the first solar cell row 4a will be described here.

  The first solar cell row 4 a is composed of nine solar cells 4. The nine solar cells 4 are arranged along the longitudinal direction of the back sheet 6 with their light receiving surfaces facing in the same direction. The nine solar cells 4 are connected in series via the wiring 7. Specifically, as shown in FIG. 3, one side in the longitudinal direction of the wiring 7 is connected to the surface of the solar battery cell 4, and the other side in the longitudinal direction of the wiring 7 is connected to the back surface of the adjacent solar battery cell 4. Yes.

  Moreover, as shown in FIG.5 and FIG.6, the wiring 7 connected to the photovoltaic cell 4 arrange | positioned at both ends among the nine photovoltaic cells 4 is the longitudinal direction of the 1st photovoltaic cell row | line | column 4a. It is connected to ribbon wiring 8 arranged on both sides. The wiring 7 and the ribbon wiring 8 are connected by a connecting method such as soldering or welding.

  Furthermore, the 1st photovoltaic cell row | line | column 4a and the 2nd photovoltaic cell row | line | column 4b are connected in series via the ribbon wiring 8 arrange | positioned by the one side of the longitudinal direction. That is, all the 18 solar cells 4 constituting the first solar cell group 4A are connected in series. Similarly, the third solar cell row 4c, the fourth solar cell row 4d, the fifth solar cell row 4e, and the sixth solar cell row 4f are also arranged at one end in the longitudinal direction. They are connected in series via the ribbon wiring 8.

  Further, the second solar cell row 4b and the fifth solar cell row 4e are connected in series via a ribbon wiring 8 disposed on the other side in the longitudinal direction. That is, the first solar cell group 4A and the third solar cell group 4C are connected in series. Similarly, the sixth solar cell row 4f and the third solar cell row 4c are connected in series via a ribbon wiring 8 disposed on the other side in the longitudinal direction. Therefore, the second solar cell group 4B and the third solar cell group 4C are also connected in series. Thus, all the three photovoltaic cell groups 4A to 4C are connected in series.

  FIG. 7 is an explanatory view showing a state in which the solar cell panel according to the solar cell module is cut in the lateral direction. As shown in FIG. 7, two ribbon wirings 8 arranged at both ends of four ribbon wirings 8 arranged on one side in the longitudinal direction of the six solar cell rows 4a to 4f (see FIG. 1) One side or the other side in the longitudinal direction is bent at a substantially right angle. Of the four ribbon wirings 8, the remaining two ribbon wirings 8 are bent substantially vertically on both sides in the longitudinal direction. One end or both ends of the bent ribbon wiring 8 are respectively inserted into six through holes 14 provided in the back sheet 6. The ribbon wiring 8 inserted through the through hole 14 is pulled out to the back side of the back sheet 6 and connected to the three terminal boxes 5A, 5B, 5C, respectively.

  In this example, a crystalline solar battery cell is used as the solar battery cell 4. However, the solar battery cell 4 used in this example is not limited to a crystalline solar battery cell, and is not limited to an amorphous solar battery cell or a mixed crystal / amorphous solar battery. A cell may be used.

  In addition, the number of the photovoltaic cells 4 which comprise a photovoltaic cell group is not limited to what was mentioned above. The number of solar cells 4 constituting the solar cell group 4A may be 17 or less, or 19 or more. Moreover, you may provide two or four or more photovoltaic cell groups. Furthermore, the solar battery cell 4 may be formed not only in a substantially rectangular shape but also in a substantially pentagonal shape or a circular shape.

[Terminal box]
As shown in FIG. 2, the three terminal boxes 5 </ b> A, 5 </ b> B, 5 </ b> C are arranged on one side in the longitudinal direction of the solar cell panel 2 on the back surface of the solar cell panel 2. The first terminal box 5 </ b> A is disposed on one side in the short direction of the solar cell panel 2, and the second terminal box 5 </ b> B is disposed on the other side in the short direction of the solar cell panel 2. The third terminal box 5 </ b> C is disposed at the approximate center in the short direction of the solar cell panel 2.

  Specifically, the first terminal box 5A is disposed to face the surface opposite to the light receiving surface of the first solar cell group 4A. Similarly, the second terminal box 5B is disposed to face the surface opposite to the light receiving surface of the second solar cell group 4B, and the third terminal box 5C is provided in the third solar cell group 4C. Is disposed opposite to the surface opposite to the light receiving surface. That is, the three terminal boxes 5A to 5C are arranged in the vicinity of the corresponding three solar battery cell groups 4A to 4C. For example, when the surface material of the solar cell panel 2 is formed of a resin sheet instead of the transmissive glass, the three terminal boxes 5A to 5C may be attached to the surface side of the solar cell panel 2.

  Next, the terminal box will be described with reference to FIGS. FIG. 8 is a plan view showing the first terminal box and the second terminal box, and FIG. 9 is a plan view showing the third terminal box.

Since the first terminal box 5A and the second terminal box 5B have substantially the same configuration, only the first terminal box 5A will be described here.
As shown in FIG. 8, the first terminal box 5A has a case 15 formed in a hollow, substantially rectangular parallelepiped shape. A first bypass diode 16A and two terminal pieces 17 and 18 are accommodated in the case 15 of the first terminal box 5A. In addition, two openings 19 and 19 are provided on the bottom surface of the case 15 at a predetermined interval.

  The first terminal piece 17 and the second terminal piece 18 are fixed to the bottom surface part with a predetermined interval. The ends of the first terminal piece 17 and the second terminal piece 18 are located above the two openings 19 and 19. A first bypass diode 16 </ b> A is disposed between the first terminal piece 17 and the second terminal piece 18. The first bypass diode 16A is electrically connected to the first terminal piece 17 and the second terminal piece 18 by soldering. The first bypass diode 16A and the first terminal piece 17 and the second terminal piece 18 may be connected not only by soldering but also by a connection method such as welding or press fitting. Further, the positive terminal 20 for output is connected to the first terminal piece 17.

  In the second terminal box 5B, the second bypass diode 16B is accommodated and connected to the first terminal piece 17 and the second terminal piece 18. Further, an output negative terminal 21 is connected to the second terminal piece 18 of the second terminal box 5B.

  The first terminal box 5A is attached to the back sheet 6 such that the bottom surface of the first terminal box 5A is superimposed on the back surface of the back sheet 6 and the two openings 19 and 19 are opposed to the through holes 14 provided in the back sheet 6. Yes.

  As shown in FIG. 9, the third terminal box 5C has a case 22 formed in a hollow, substantially rectangular parallelepiped shape, like the first and second terminal boxes 5A and 5B. The case 22 of the third terminal box 5C houses the third bypass diode 16C and the two terminal pieces 23 and 24. In addition, two openings 26 and 26 are provided on the bottom surface of the case 22. The third terminal box 5C is obtained by removing the output positive terminal 20 or the negative terminal 21 from the first and second terminal boxes 5A and 5B. Since other configurations are the same as those of the first and second terminal boxes 5A and 5B, description thereof is omitted.

  Next, the connection between the three terminal boxes 5A to 5C and the three solar battery cell groups 4A to 4C will be described with reference to FIGS. FIG. 10 is a block diagram showing a circuit configuration of the solar cell module of this example.

  As shown in FIGS. 7 and 10, the end portions of the two ribbon wirings 8 connected to the first solar cell group 4A are inserted into the two openings 19 and 19 of the first terminal box 5A. Yes. The two ribbon wirings 8 and 8 are fixed to the first terminal piece 17 or the second terminal piece 18 by soldering. Thereby, the 1st solar cell group 4A and the 1st terminal piece 17 and the 2nd terminal piece 18 which were provided in the 1st terminal box 5A are electrically connected. That is, the first bypass diode 16A provided in the first terminal box 5A is connected in parallel with the first solar cell group 4A.

  Similarly, the second bypass diode 16B provided in the second terminal box 5B is connected in parallel with the second solar cell group 4B, and the third bypass diode provided in the third terminal box 5C. 16C is connected in parallel with the third solar cell group 4C.

  In this example, the ribbon wiring 8 and the terminal pieces 17 and 18 are fixed by soldering. However, the present invention is not limited to this. For example. The ribbon wiring 8 and the terminal pieces 17 and 18 may be fixed by clips or connected by a fixing method such as welding.

  Here, functions of the three bypass diodes 16A to 16C will be described. Of the three solar cell groups 4A to 4C, for example, when a shadow occurs in the first solar cell group 4A due to fallen leaves, the first solar cell group 4A becomes a resistance and generates heat or a solar cell module. There is a risk that the power generation amount of the entire 1 is reduced. Therefore, the first bypass diode 16A connected in parallel with the first solar cell group 4A exhibits a bypass function to electrically bypass the shaded first solar cell group 4A. As a result, it is possible to generate power with the remaining two solar battery cell groups 4B and 4C.

  As described above, according to the solar cell module 1 of the present example, the three bypass diodes 16A, 16B, and 16C are divided and housed in the three terminal boxes 5A, 5B, and 5C, respectively. Therefore, since the heat (generation) sources stored in the three terminal boxes 5A, 5B, and 5C are reduced, it is possible to suppress an increase in temperature in the three terminal boxes 5A, 5B, and 5C. As a result, the heat dissipation mechanism can be downsized or eliminated, and the terminal boxes 5A, 5B, and 5C can be downsized. Further, the three bypass diodes 16A, 16B, and 16C do not have to be affected by the heat generated in the adjacent bypass diodes.

  Moreover, in this example, each terminal box 5A, 5B, 5C is arrange | positioned facing the corresponding photovoltaic cell group 4A, 4B, 4C. That is, each terminal box 5A, 5B, 5C is arranged in the vicinity of the corresponding solar cell group 4A, 4B, 4C. Therefore, the length of the ribbon wiring 8 that connects each of the solar battery cell groups 4A, 4B, 4C and each of the bypass diodes 16A, 16B, 16C can be shortened. As a result, the wiring from the three solar cell groups 4A, 4B, 4C to the connection terminals of the terminal boxes 5A, 5B, 5C can be simplified. Furthermore, since there are no locations where the ribbon wiring 8 intersects, the number of parts of the insulating member can be reduced.

  Furthermore, when the number of photovoltaic cell groups increases, the number of bypass diodes also increases corresponding to the number of photovoltaic cell groups. Here, in the conventional solar cell module, it is necessary to make the size and shape of the terminal box correspond to the number of bypass diodes, and a dedicated terminal box corresponding to the number of bypass diodes is required. On the other hand, according to the solar cell module 1 of this example, it is only necessary to increase the number of third terminal boxes 5C in accordance with the number of bypass diodes, and it is not necessary to develop a new terminal box. As a result, in the solar cell module 1 of this example, the versatility of the terminal box can be improved.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention described in the claims. In the above-described embodiment, the solar cell panel according to the solar cell module is formed in a rectangular shape, but may be formed in a hexagonal shape or a circular shape. Further, without using the ribbon wiring 8, the wiring 7 may be pulled out from the back sheet 6 and directly connected to the terminal piece of the corresponding terminal box.

  DESCRIPTION OF SYMBOLS 1 ... Solar cell module, 2 ... Solar cell panel, 3 ... Frame, 4A ... 1st solar cell group, 4B ... 2nd solar cell group, 4C ... 3rd solar cell group, 4a-4f DESCRIPTION OF SYMBOLS 1st-6th photovoltaic cell row, 4 ... Solar cell, 5A ... 1st terminal box, 5B ... 2nd terminal box, 5C ... 3rd terminal box, 6 ... Back sheet, 7 ... Wiring 8 ... Ribbon wiring, 9 ... Transmission glass, 16A ... First bypass diode, 16B ... Second bypass diode, 16C ... Third bypass diode, 20 ... Positive electrode terminal, 21 ... Negative electrode terminal

Claims (6)

A first solar cell group for converting light into electric power;
A second solar cell group connected in series with the first solar cell group and converting light into electric power;
A first terminal box having a first bypass diode connected in parallel with the first solar cell group;
A second terminal box having a second bypass diode connected in parallel with the second solar cell group;
Solar cell module with The solar cell module according to claim 1, wherein the first solar cell group and the second solar cell group are configured by connecting a plurality of solar cells in series. The first terminal box is provided with a positive terminal for output,
The solar cell module according to claim 1, wherein an output negative electrode terminal is provided in the second terminal box. The first terminal box is disposed to face the first solar cell group,
The solar cell module according to any one of claims 1 to 3, wherein the second terminal box is arranged to face the second solar cell group. The first terminal box is disposed to face a surface opposite to the light receiving surface of the first solar cell group,
The solar cell module according to claim 4, wherein the second terminal box is disposed to face a surface opposite to a light receiving surface of the second solar cell group. A third solar cell group connected in series with the first solar cell group and the second solar cell group and converting light into electric power;
The solar cell module according to claim 1, further comprising: a third terminal box having a third bypass diode connected in parallel with the third solar cell group.

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