JP2013021177A - Solar cell module, method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module capable of suppressing occurrence of distortion caused by an end part of an output conductor connected to a bus bar electrode and accumulation of internal stress, and provide a method of manufacturing the same.SOLUTION: A solar cell 15 disposed on an end part of a solar cell string 16 is connected to a bus bar electrode 20 disposed along the solar cell 15 (a rear face conductive layer 13) though a cell connection part 21. The bus bar electrode 20 is connected to a connection part 22c (an end part of an output conductor 22) of the output conductor 22 disposed along an extension direction of the solar cell string 16 though a conductor connection part 23. An insulation film 24 is disposed between the output conductor 22 and the solar cell 15 (the rear face conductive layer 13), a film thickness Tr of the insulation film 24 is larger than a distance Dis from the rear face conductive layer 13 to the output conductor 22 (the connection part 22c). A height Ht1 of the connection part 22c from the solar cell 15 is smaller than a height Ht2 of the output conductor 22 at the part where the insulation film 24 is disposed.

Description

  The present invention relates to a solar cell module having a plurality of solar cells formed on a translucent substrate, and a method for manufacturing the solar cell module.

  There has been proposed a solar cell module having a large capacity by a solar cell string in which a plurality of solar cells are formed in series on the back side of a translucent substrate serving as a light receiving surface. In the solar cell module, solar cells (solar cell strings) are sealed with a translucent substrate and a back surface protective film (or back surface substrate) disposed on the back surface side. A sealing portion for sealing the solar battery cell with a resin is formed between the solar battery cell and the back surface protective film (back surface substrate).

  Moreover, as for the solar cell module, the wiring for taking out the electric power from a solar cell string is arrange | positioned between the translucent board | substrate and the back surface protective film (back surface substrate). In particular, when a back substrate is applied, a wiring is present between the translucent substrate, the sealing portion, and the back substrate, so that the structure is complicated.

  In addition, the accumulation of internal stress may cause cracks in the substrate and deformation of the sealing portion with time, and may reduce reliability.

  A conventional solar cell module and a manufacturing method thereof will be described with reference to FIGS. 6A and 6B. Such a conventional technique is disclosed in, for example, Patent Document 1.

  FIG. 6A is an exploded perspective view showing the relationship among solar cells 115 (solar cell strings 116), lead-out lines (bus bar electrodes) 120, and lead-out lines (output conductors) 122 in the conventional solar battery module 101 in an exploded manner. .

  6B is a perspective view showing a state in which the lead-out line 120 and the lead-out line 122 shown in FIG. 6A are connected to the solar battery cell 115 (solar battery string 116).

  The solar cell module 101 includes a translucent insulating substrate 110 and solar cells 115 (a solar cell string 116 formed by connecting the solar cells 115 in series) formed on the translucent insulating substrate 110. In addition, lead-out lines 120 are arranged corresponding to the solar cells 115 (back surface conductive layers 113) arranged at both ends of the solar cell string 116. The lead-out line 120 is disposed corresponding to the solar battery cell 115 at the end of the solar battery string 116, and is configured to collect and take out the electric power from the solar battery string 116. If one of the solar cell strings 116 is a plus side, the other of the solar cell strings 116 constitutes a minus side.

  The lead-out line 120 is connected to the back surface conductive layer 113 (solar battery cell 115) by, for example, soldering or conductive paste. A connection portion 120b is formed at the center of the lead-out line 120, and the connection end portion 122c of the lead-out line 122 is connected to the connection portion 120b of the lead-out line 120 by soldering.

  The lead-out line 122 includes a connection end 122c on the side connected to the lead-out line 120, an outer end 122t on the side led out to the outside opposite to the connection end 122c, and the connection end 122c and the outer end. An insulating film 124 for covering and insulating the lead wire 122 is formed between the lead wire 122t and the lead wire 122t. The lead-out wire 122 is insulated from the solar battery cell 115 (the back surface conductive layer 113) by the insulating film 124, and the electric power from the solar battery string 116 can be drawn out to the outside.

  When the connection end portion 122c of the lead-out line 122 is connected to the connection portion 120b of the lead-out line 120 by soldering, there is a possibility that the melted solder may damage adjacent solar cells 115. That is, there is a possibility of short-circuiting the surrounding solar battery cell 115 (back surface conductive layer 113) or peeling back surface conductive layer 113.

  Therefore, in order to prevent the molten solder from damaging the surrounding solar battery cell 115 (back surface conductive layer 113), the connection portion 120b (lead-out line 120) corresponding to the region of the connection portion 120b to be soldered and its periphery. ) And the solar battery cell 115 (solar battery string 116).

  The isolation member 125 is a resin film that has an adhesive property on one side and can be fixed to the solar battery cell 115 (the back surface conductive layer 113). For example, a polyimide tape is applied. The isolation member 125 is disposed in advance before connecting the lead-out line 120 to the solar battery cell 115. By disposing the separating member 125, when connecting the connection end portion 122c to the connection portion 120b, it is possible to prevent damage to the solar battery cell 115 due to melting of the solder, but the polyimide tape is expensive, and the process There arises a problem of increasing the number, the number of parts, and the cost.

  Further, the separating member 125 needs to have a certain thickness in order to maintain the shape, and overlaps with the connection portion 120b and the connection end portion 122c. Therefore, the connection end of the lead wire 122 connected to the extraction line 120 The height at the portion 122 c (the height of the upper surface of the connection end portion 122 c from the solar battery cell 115) is higher than the surroundings according to the thickness of the isolation member 125.

  Further, since the step of connecting the connection end portion 122c to the connection portion 120b is manual soldering to suppress the influence on the solar battery cell 115, high-precision soldering (high-precision height control) ) And it is difficult to suppress (control with high accuracy) the height of the connection end 122c from the solar battery cell 115.

JP 2010-165906 A

  In the conventional solar cell module, the problem that the distortion | strain accompanying resin sealing generate | occur | produces in the edge part of wiring and accumulation | storage of internal stress (residual stress) arises arises. Further, the occurrence of distortion may cause cracking when the translucent substrate and the back substrate are made of a hard glass plate or the like.

  Further, in the conventional solar cell module 101 shown in FIGS. 6A and 6B, the connection end 122c, which is the end of the lead wire 122, is higher than the surroundings, so that it faces the translucent insulating substrate 110. When the back substrate (not shown) is disposed and the solar battery cell 115 (solar cell string 116) is resin-sealed, the translucent insulating substrate 110 or the back substrate is cracked due to distortion generated around the connection end 122c. In addition, since accumulation of internal stress occurs, there is a problem that the substrate is cracked and the sealing portion is deformed with the passage of time, and the reliability is lowered.

  The present invention has been made in view of such a situation, and the height of the output conductor from the solar battery cell at the connection position between the bus bar electrode connected to the solar battery cell and the output conductor that outputs electric power to the outside. It is an object of the present invention to provide a solar cell module that can suppress the occurrence of distortion caused by the end of the output conductor or the accumulation of internal stress by controlling (reducing the height) with high accuracy. .

  Moreover, this invention is a manufacturing method of the solar cell module which concerns on this invention, Comprising: A bus-bar electrode and an output conductor are connected in advance, A bus-bar electrode is connected to a photovoltaic cell, and an output conductor is made into a bus-bar electrode. Another object of the present invention is to provide a method for manufacturing a solar cell module that can eliminate the influence on the solar cell (back surface conductive layer) when connecting and reduce damage to the solar cell (back surface conductive layer). To do.

  Moreover, this invention is a lead member applied to the solar cell module which concerns on this invention, Comprising: By connecting a bus-bar electrode and an output conductor by connecting a bus-bar electrode and an output conductor beforehand, it is based on. Another object is to provide a lead member that eliminates the influence on solar cells.

  A solar cell module according to the present invention includes a translucent substrate, a plurality of solar cells formed on one surface of the translucent substrate, and a solar cell connected to any of the plurality of solar cells. A bus bar electrode for collecting electric power, an output conductor connected to the bus bar electrode and outputting the electric power to the outside, and an insulating film disposed between the output conductor and the solar battery cell, the insulating property The film thickness of the film is larger than a distance from the solar battery cell to the output conductor at a connection position where the bus bar electrode and the output conductor are connected.

  Therefore, in the solar cell module according to the present invention, the height from the solar cell of the output conductor at the connection position (output conductor connection portion) where the output conductor is connected to the bus bar electrode is different from the connection position. The height of the output conductor from the solar cell in the area where the insulating film is placed can be kept lower, and the output conductor at the connection position (output conductor connection) is reduced in height, so connection It is possible to suppress the occurrence of distortion or the accumulation of internal stress due to the output conductor having an end portion (connecting portion) at the position.

  In the solar cell module according to the present invention, the insulating film covers a surface of the output conductor facing the solar cell.

  Therefore, the solar cell module according to the present invention easily secures the height of the output conductor from the solar cell and the insulation of the output conductor with respect to the solar cell, and the output conductor at the connection position (connection portion of the output conductor). The height can be suppressed with high accuracy.

  In the solar cell module according to the present invention, the translucent substrate and the back substrate are formed of a glass plate.

  Therefore, since the solar cell module according to the present invention suppresses strain and stress applied to the glass plate, damage to the glass plate is prevented, and a laminated glass solar cell module excellent in productivity and reliability is realized.

  In the solar cell module according to the present invention, the conductor connection portion that connects the bus bar electrode and the output conductor at the connection position is formed by soldering using a pulse heater.

  Therefore, the solar cell module according to the present invention can easily form a conductor connecting portion capable of controlling the height with high accuracy, and can realize a reduction in the height of the output conductor with high accuracy.

  Moreover, in the solar cell module according to the present invention, the cell connection portion that connects the solar cell and the bus bar electrode is formed of a conductive paste.

  Therefore, when the solar cell module according to the present invention connects the bus bar electrode to the solar battery cell to form the cell connection portion, the solar battery module can be connected at a lower temperature than soldering. Stable connection can be achieved by suppressing adverse effects.

  Moreover, in the solar cell module according to the present invention, the solar cell is a thin film solar cell including a translucent conductive layer, a photovoltaic layer, and a back surface conductive layer from the translucent substrate side. It is characterized by.

  Therefore, the solar cell module according to the present invention can constitute a thin film solar cell module.

  The method for manufacturing a solar cell module according to the present invention includes a step of forming a plurality of solar cells on one surface of a translucent substrate, a bus bar electrode for collecting power from the solar cells, and outputting the power to the outside. A bus bar electrode connected to the output conductor in any of the plurality of solar cells in a state where an insulating film is disposed between the output conductor and the solar cell. A thickness of the insulating film is larger than an interval from the solar cell to the output conductor at a connection position where the bus bar electrode and the output conductor are connected. To do.

  Therefore, since the manufacturing method of the solar cell module according to the present invention connects the bus bar electrode to the solar cell in a state where the bus bar electrode and the output conductor are connected in advance, the output conductor after connecting the bus bar electrode to the solar cell. Compared to the conventional method of connecting the output bar to the bus bar electrode, the influence on the solar cell (back conductive layer) when connecting the output conductor to the bus bar electrode can be eliminated, and the solar cell (back conductive layer) Damage can be reduced.

  Moreover, the manufacturing method of the solar cell module according to the present invention includes a plurality of solar cells formed on one surface of the translucent substrate, and power from the solar cells connected to any of the plurality of solar cells. A solar cell module comprising: a bus bar electrode for collecting the output; and an output conductor connected to the bus bar electrode to output the electric power to the outside, before connecting the bus bar electrode to the solar cell, The bus bar electrode and the output conductor are connected in advance.

  Therefore, the solar cell module manufacturing method according to the present invention enables the bus bar electrode and the output conductor to be connected in a state where the bus bar electrode and the output conductor are connected in advance, so that the bus bar electrode and the output conductor are connected. It becomes possible to eliminate the influence on the solar battery cell by doing.

  In the method for manufacturing a solar cell module according to the present invention, the terminal portion of the output conductor is bent in advance in a direction away from the solar cell before the bus bar electrode is connected to the solar cell. It is characterized by that.

  Therefore, the method for manufacturing a solar cell module according to the present invention improves the workability because there is no need to bend the output conductor after connecting the bus bar electrode to the solar cell, and the solar cell by the process of bending the output conductor. The influence on the cell can be eliminated.

  The lead member according to the present invention includes a plurality of solar cells formed on one surface of a light-transmitting substrate, and a bus bar electrode that is connected to any of the plurality of solar cells and collects electric power from the solar cells. And a lead member applied to a solar cell module comprising an output conductor connected to the bus bar electrode and outputting the electric power to the outside, wherein the lead member is configured by connecting the bus bar electrode and the output conductor in advance. It is characterized by being.

  Therefore, the lead member according to the present invention can connect the bus bar electrode to the solar battery cell in a state where the bus bar electrode and the output conductor are connected in advance, and the solar battery cell by connecting the bus bar electrode and the output conductor. It becomes possible to eliminate the influence on.

  In the lead member according to the present invention, the terminal portion of the output conductor is bent in advance in a direction away from the solar battery cell before the bus bar electrode is connected to the solar battery cell. To do.

  Therefore, the lead member according to the present invention improves workability because there is no need to bend the output conductor after the bus bar electrode is connected to the solar cell, and the influence on the solar cell by bending the output conductor. Can be eliminated.

  In the solar cell module according to the present invention, the thickness of the insulating film disposed between the output conductor and the solar cell is determined from the solar cell to the output conductor at the connection position where the bus bar electrode and the output conductor are connected. It is larger than the interval.

  Therefore, in the solar cell module according to the present invention, the height from the solar cell of the output conductor at the connection position (output conductor connection portion) where the output conductor is connected to the bus bar electrode is different from the connection position. The output conductor in the area where the insulating film is placed is kept lower than the height from the solar cell, and the output conductor at the connection position (output conductor connection part) is lowered, so the output conductor at the connection position Has the effect of suppressing the generation of strain or the accumulation of internal stress due to the end portion (connecting portion).

  Further, the method for manufacturing a solar cell module according to the present invention connects the bus bar electrode to which the output conductor is connected in a state where the insulating film is disposed between the output conductor and the solar cell, to the solar cell, and this connection In this case, the thickness of the insulating film is made larger than the distance from the solar battery cell to the output conductor at the connection position where the bus bar electrode and the output conductor are connected.

  Therefore, since the manufacturing method of the solar cell module according to the present invention connects the bus bar electrode to the solar cell in a state where the bus bar electrode and the output conductor are connected in advance, the solar cell when connecting the output conductor to the bus bar electrode The effect on the (back conductive layer) can be eliminated, and the effect of reducing damage to the solar battery cell (back conductive layer) is achieved.

  A method for manufacturing a solar cell module according to the present invention is a method for manufacturing a solar cell module comprising a solar cell, a bus bar electrode that collects electric power from the solar cell, and an output conductor that outputs electric power to the outside. Then, before connecting the bus bar electrode to the solar battery cell, the bus bar electrode and the output conductor are connected in advance.

  Therefore, the solar cell module manufacturing method according to the present invention enables the bus bar electrode and the output conductor to be connected in a state where the bus bar electrode and the output conductor are connected in advance, so that the bus bar electrode and the output conductor are connected. There is an effect that it becomes possible to eliminate the influence on the solar battery cell by doing.

  The lead member according to the present invention is a lead member applied to a solar cell module including a solar cell, a bus bar electrode that collects electric power from the solar cell, and an output conductor that outputs electric power to the outside. The bus bar electrode and the output conductor are connected in advance.

  Therefore, the lead member according to the present invention can connect the bus bar electrode to the solar battery cell in a state where the bus bar electrode and the output conductor are connected in advance, and the solar battery cell by connecting the bus bar electrode and the output conductor. There is an effect that it becomes possible to eliminate the influence on.

It is principal part sectional drawing which shows typically the cross section of the principal part of the solar cell module which concerns on embodiment of this invention. In the manufacturing method of the solar cell module which concerns on embodiment of this invention, it is sectional drawing which shows the cross-sectional state in the manufacturing process which formed the photovoltaic cell (solar cell string) in the translucent board | substrate. It is sectional drawing which shows the cross-sectional state in the manufacturing process which connected the output conductor and the bus-bar electrode through the conductor connection part in another manufacturing process isolate | separated from the manufacturing process of FIG. 2A. After the manufacturing process of FIGS. 2A and 2B, the output conductor to which the bus bar electrode is connected is disposed so as to face the solar battery cell, and the bus bar electrode is connected to the solar battery cell (back surface conductive layer) via the cell connecting portion. It is sectional drawing which shows the cross-sectional state in a manufacturing process. It is sectional drawing which shows the cross-sectional state in the manufacturing process before forming a sealing part by making a sealing resin material and a back substrate oppose a translucent board | substrate, and forming after a manufacturing process of FIG. 2C. In the manufacturing method of the solar cell module according to the embodiment of the present invention, the exploded perspective view showing the state before the bus bar electrode to which the output conductor is connected and the solar cell (solar cell string) are mutually connected. FIG. It is a perspective view which shows the state in the manufacturing process which connected the bus-bar electrode and the photovoltaic cell after the manufacturing process of the solar cell module shown to FIG. 3A. It is a disassembled perspective view which decomposes | disassembles and shows the sealing resin material and back substrate which are arrange | positioned facing a translucent board | substrate after the manufacturing process of the solar cell module shown to FIG. 3B. It is sectional drawing which shows the output conductor applied to the solar cell module which concerns on embodiment of this invention, and an insulating film in the cross-sectional state in the length direction containing a connection part. It is sectional drawing which shows the cross-sectional state of the bus-bar electrode connected to the connection part of the output conductor shown to FIG. 4A. FIG. 4B is a cross-sectional view illustrating a cross-sectional state when the output conductor (connection portion) illustrated in FIG. 4A and the bus bar electrode illustrated in FIG. 4B are connected via the conductor connection portion. It is sectional drawing which shows the cross-sectional state in the arrow XX direction of the output conductor and insulating film which were shown to FIG. 4C. It is sectional drawing which shows the modification of the output conductor shown to FIG. 5A, and an insulating film. It is a disassembled perspective view which decomposes | disassembles and shows the relationship of the photovoltaic cell (solar cell string), extraction line (bus-bar electrode), and lead-out line (output conductor) in the conventional solar cell module. It is a perspective view which shows the state which connected the taking-out line | wire and leader line shown to FIG. 6A to the photovoltaic cell (solar cell string).

  Hereinafter, with reference to FIG. 1 thru | or FIG. 5B, the solar cell module which concerns on embodiment of this invention, the manufacturing method of a solar cell module, and a lead member are demonstrated.

  Hereinafter, the structure of the solar cell module according to the present embodiment will be described with reference to FIG. Based on FIG. 2A thru | or FIG. 2D, the manufacturing method of the solar cell module which concerns on this Embodiment is demonstrated corresponding to the part shown in FIG. Based on FIG. 3A thru | or FIG. 3C, the manufacturing method of the solar cell module which concerns on this Embodiment is demonstrated corresponding to the whole structure of a translucent board | substrate, a bus-bar electrode, an output conductor, a sealing resin material, and a back substrate. Based on FIG. 4A thru | or FIG. 4C, the manufacturing process which connects the bus-bar electrode and output conductor in the solar cell module which concerns on this Embodiment is demonstrated. Based on FIG. 5A and FIG. 5B, the relationship between the output conductor of the solar cell module which concerns on this Embodiment, and an insulating film is demonstrated.

  FIG. 1 is a main part sectional view schematically showing a cross section of a main part of a solar cell module 1 according to an embodiment of the present invention.

  The solar cell module 1 according to the present embodiment forms a solar cell string 16 by connecting a plurality of solar cells 15 in series. The solar battery cell 15 includes a translucent conductive layer 11 formed by sequentially laminating on one surface (surface opposite to the light incident surface) of the translucent substrate 10 having insulating properties and translucency. The power layer 12 and the back surface conductive layer 13 are formed in a strip shape (see FIG. 3A). A plurality of strip-shaped solar cells 15 are arranged in parallel in the lateral direction of the strip (see FIG. 3A), and adjacent solar cells 15 have the adjacent back surface conductive layer 13 and translucent conductive layer 11 connected to each other. A series connection is configured by connecting to

  That is, the solar battery cell 15 is preferably a thin film solar battery cell provided with the translucent conductive layer 11, the photovoltaic layer 12, and the back surface conductive layer 13 from the translucent substrate 10 side. With this configuration, the solar cell module 1 can constitute a thin film solar cell module.

  The solar battery cell 15 arranged at the end of the solar battery string 16 is connected to the bus bar electrode 20 (see FIG. 3A) arranged along the solar battery cell 15 (back surface conductive layer 13) via the cell connection part 21. Has been. Further, the bus bar electrode 20 is connected to a connection portion 22c (an end portion of the output conductor 22) of the output conductor 22 (see FIG. 3A) disposed along the extending direction of the solar cell string 16 via the conductor connection portion 23. ing.

  In addition, in this Embodiment, although the solar cell string 16 was set as the form which connected the photovoltaic cell 15 in series, this invention is applicable also when the photovoltaic cell 15 is connected in parallel.

  One end of the solar cell string 16 (solar cell 15 arranged at the end) constitutes, for example, a positive output end of the solar cell string 16, and the other end (end) of the solar cell string 16. The solar cells 15) arranged on the side constitute, for example, the negative output end of the solar cell string 16. An output conductor 22 is connected to the solar cell 15 at the end via a bus bar electrode 20, and the power generated by the photovoltaic layer 12 is collected and extracted to the outside (see FIG. 3B). In FIG. 1, only one end (configuration) of the solar cell string 16 is taken out and schematically shown in consideration of easy understanding and easy viewing of the drawing.

  The output conductor 22 has a connection portion 22 c at a position where it is connected to the bus bar electrode 20. Further, the portion other than the connection portion 22 c of the output conductor 22 is disposed so as to face the solar battery cell 15. In a portion other than the connection portion 22c of the output conductor 22, the output conductor 22 and the solar cell 15 (back surface conduction) are provided so that the surface facing the solar cell 15 does not contact (short circuit) with the solar cell 15 (back surface conductive layer 13). An insulating film 24 is arranged between the layer 13).

  The film thickness Tr of the insulating film 24 is larger than the distance Dis between the solar battery cell 15 (back surface conductive layer 13) and the output conductor 22 (connection portion 22c). With this configuration, the height Ht1 of the connecting portion 22c constituting the end portion of the output conductor 22 from the solar battery cell 15 is an output at a portion other than the connecting portion 22c (the portion where the insulating film 24 is disposed). The height of the conductor 22 becomes smaller than the height Ht2, and the protruding state of the connecting portion 22c at the end of the output conductor 22 can be suppressed.

  In addition, it is preferable that the translucent board | substrate 10 and the back substrate 30 are formed with the glass plate. Therefore, the solar cell module 1 suppresses the strain and stress applied to the glass plate, thereby preventing the glass plate from being damaged and realizing the laminated glass solar cell module 1 excellent in productivity and reliability. Moreover, it is also possible to set it as the solar cell module of the multilayer glass system which made the back substrate 30 multilayered as glass with a net | network.

  That is, when the solar cell string 16 is sealed and protected by the translucent substrate 10, the sealing portion 27, and the back substrate 30, the generation of distortion around the connection portion 22c is suppressed, and the connection portion 22c It is possible to prevent the accumulation of stress around Therefore, damage to the substrate in the manufacturing process due to the occurrence of distortion (such as cracking of the transparent substrate 10 and the back substrate 30) is prevented, and damage to the substrate during actual operation due to accumulation of stress is prevented. can do.

  As described above, solar cell module 1 according to the present embodiment includes translucent substrate 10, a plurality of solar cells 15 formed on one surface of translucent substrate 10, and a plurality of solar cells 15. Connected to the bus bar electrode 20 for collecting electric power from the solar battery cell 15, an output conductor 22 connected to the bus bar electrode 20 for outputting electric power to the outside, and disposed between the output conductor 22 and the solar battery cell 15. The film thickness Tr of the insulating film 24 is from the solar battery cell 15 to the output conductor 22 at the connection position (connecting portion 22c) where the bus bar electrode 20 and the output conductor 22 are connected. It is characterized by being larger than the interval Dis.

  Therefore, in the solar cell module 1 according to the present embodiment, the height of the output conductor 22 from the solar battery cell 15 at the connection position where the output conductor 22 is connected to the bus bar electrode 20 (connection portion 22c of the output conductor 22). Ht1 can be suppressed to be lower than the height Ht2 of the output conductor 22 from the solar battery cell 15 at another position (region where the insulating film 24 is disposed) different from the connection position. Since the output conductor 22 at the connection portion 22c) is reduced in height, it is possible to suppress the occurrence of distortion or the accumulation of internal stress due to the output conductor 22 having the end portion (connection portion 22c) at the connection position. become.

  That is, the solar cell module 1 according to the present embodiment reduces damage to the light-transmitting substrate 10 (or the back substrate 30 facing the light-transmitting substrate 10) in the manufacturing process, and damage due to change over time. And can improve productivity and reliability.

  FIG. 2A is a cross-sectional view showing a cross-sectional state in a manufacturing process in which solar cells 15 (solar cell strings 16) are formed on a translucent substrate 10 in the method for manufacturing the solar cell module 1 according to the embodiment of the present invention. It is.

The translucent substrate 10 is, for example, a glass plate (white plate glass). The translucent conductive layer 11 is, for example, a transparent conductive oxide (TCO), and specifically, SnO ₂ , ZnO, ITO (Indium Tin Oxide), and the like are, for example, thermal CVD (Chemical Vapor Deposition). Formed by law. The photovoltaic layer 12 is, for example, a silicon-based photoelectric conversion film (such as amorphous silicon or microcrystalline silicon), a compound-based photoelectric conversion film (CdTe, CuInSe ₂ ), or the like, and is formed by, for example, a plasma CVD method. The back surface conductive layer 13 is, for example, silver, and is formed by a sputtering method.

  The translucent conductive layer 11 is formed on the translucent substrate 10 with a film thickness of about 0.5 to 1 μm, for example, and is patterned into a strip shape by irradiating a laser beam, for example. A photovoltaic layer 12 is formed with a film thickness of, for example, about 0.5 μm by incorporating a pn junction on the patterned light-transmitting conductive layer 11, and is patterned into a strip shape by, for example, irradiation with a laser beam. The back surface conductive layer 13 is formed with a thickness of about 0.5 μm, for example.

  Note that a solar cell string 16 in which the solar cells 15 are connected in series is formed by patterning the translucent conductive layer 11, the photovoltaic layer 12, and the back surface conductive layer 13.

  FIG. 2B is a cross-sectional view showing a cross-sectional state in a manufacturing process in which the output conductor 22 and the bus bar electrode 20 are connected via the conductor connection portion 23 in another manufacturing process separated from the manufacturing process of FIG. 2A.

  The output conductor 22 is a plate-shaped metal foil (for example, copper foil), and is formed with a thickness of about 100 to 150 μm, for example. The bus bar electrode 20 is a plate-shaped metal foil (for example, copper foil), and is formed with a thickness of, for example, about 80 to 100 μm. An end portion (connecting portion 22 c) of the output conductor 22 is connected to the bus bar electrode 20 via the conductor connecting portion 23. The conductor connecting portion 23 is preferably formed by soldering using a pulse heater capable of highly accurate temperature management.

  That is, the bus bar electrode 20 and the output conductor 22 (connection portion 22c) are connected in advance to form the conductor connection portion 23. The conductor connection portion 23 is connected by applying a pulse heater, and the height (thickness) is defined with high accuracy. The pulse heater is excellent in temperature uniformity and temperature control, and can perform soldering with high uniformity with high accuracy. Therefore, by using the pulse heater, the height management with respect to the height Ht1 (see FIG. 1) can be easily performed with high accuracy, so that the output conductor 22 can be reduced in height with high accuracy.

  In addition, since the connection between the bus bar electrode 20 and the output conductor 22 is performed before the connection between the bus bar electrode 20 and the solar battery cell 15, the conductor connection portion 23 is height-controlled (thickness controlled) with high accuracy. Can be formed. The film thickness of the conductor connection portion 23 is controlled to be about 5 μm or less, for example.

  The insulating film 24 disposed between the output conductor 22 and the solar battery cell 15 (solar battery string 16) may be simply disposed (inserted) between the output conductor 22 and the solar battery cell 15. good.

  However, it is preferable that the insulating film 24 covers (adheres to) the surface of the output conductor 22 that faces the solar battery cell 15. The insulating film 24 is preferably covered with the output conductor 22 in advance, except for the region of the connecting portion 22 c, before connecting the output conductor 22 to the bus bar electrode 20. With this configuration, the solar cell module 1 easily secures the height Ht2 (see FIG. 1) of the output conductor 22 from the solar cell 15 and the insulation of the output conductor 22 with respect to the solar cell 15, and the connection position (connection) The height Ht1 (see FIG. 1) of the output conductor 22 from the solar battery cell 15 in the portion 22c) can be suppressed (reduced in height) with high accuracy.

  The insulating film 24 is formed by applying, for example, PET (polyethylene terephthalate) resin. The insulating film 24 is not formed at the position of the conductor connecting portion 23 where the output conductor 22 is connected to the bus bar electrode 20.

  As described above, the conductor connection portion 23 that connects the bus bar electrode 20 and the output conductor 22 at the connection position (connection portion 22c) is preferably formed by soldering using a pulse heater. Therefore, the solar cell module 1 can easily form the conductor connection portion 23 that can control the height Ht1 (see FIG. 1) with high accuracy, and can realize the reduction in the height of the output conductor 22 with high accuracy.

  2C, after the manufacturing process of FIGS. 2A and 2B, the output conductor 22 to which the bus bar electrode 20 is connected is disposed so as to face the solar cell 15, and the bus bar electrode 20 is connected to the solar cell 15 (the back surface conductive layer 13). It is sectional drawing which shows the cross-sectional state in the manufacturing process connected through the cell connection part 21.

  2A and 2B, the output conductor 22 is connected to the solar cell 15 in the range other than the connection portion 22c, with the bus bar electrode 20 being connected to the end portion of the connection portion 22c via the conductor connection portion 23. An insulating film 24 is formed on the opposing surface.

  Bus bar electrode 20 is connected to back surface conductive layer 13 (solar cell 15) via cell connection portion 21. The cell connection portion 21 is formed by, for example, applying a conductive paste to the back surface conductive layer 13 in advance and pressing the cell connection portion 21 against the back surface conductive layer 13. By applying the conductive paste, it is not necessary to apply a temperature enough to melt the solder required when adopting soldering, and connection at a low temperature is possible. The influence on the conductive layer 13) can be prevented.

  The conductive paste applied to the back surface conductive layer 13 may be continuously disposed on the front surface in the length direction of the back surface conductive layer 13 or may be disposed intermittently with a certain pitch. good. The film thickness of the conductive paste can be about 10 to several tens of micrometers, for example. As the conductive paste, for example, a silver paste having a small resistance value is preferable.

  As described above, the cell connection portion 21 that connects the solar battery cell 15 (the back surface conductive layer 13) and the bus bar electrode 20 is preferably formed of a conductive paste. Therefore, in the solar cell module 1 according to the present embodiment, when the bus bar electrode 20 is connected to the solar battery cell 15 to form the cell connection portion 21, connection at a lower temperature than soldering is possible. Stable connection is possible by suppressing the thermal influence on the solar battery cell 15.

  When the bus bar electrode 20 is connected to the solar cell 15, the height Ht <b> 2 of the output conductor 22 from the solar cell 15 is ensured with high accuracy by the insulating film 24, so that the bus bar electrode 20 (and the output conductor 22). Is positioned with high precision with respect to the solar battery cell 15, the height Ht1 of the connection part 22 c from the solar battery cell 15 is ensured with high precision, and the connection part 22 c (the end of the output conductor 22) is reduced in height. It can be realized reliably.

  Specifically, the thickness of the output conductor 22 is about 100 to 150 μm, the thickness of the bus bar electrode 20 is about 80 to 100 μm, the thickness of the cell connection portion 21 is about 20 μm, and the thickness of the conductor connection portion 23. Is about 5 μm, for example, the height Ht1 of the connecting portion 22c from the solar battery cell 15 is about 205 to 275 μm, for example.

  On the other hand, the height Ht2 of the output conductor 22 at the portion where the insulating film 24 is disposed needs to be larger than the height Ht1. When the height Ht2 is higher than the height Ht1 by about 25 μm, the height Ht2 is about 230 to 300 μm. At this time, the thickness of the insulating film 24 is about (230 to 300) − (100 to 150) = 130 to 150 μm by subtracting the thickness of the output conductor from the height Ht2.

  2D shows a cross-sectional state in the manufacturing process before forming the sealing portion 27 by stacking the sealing resin material 28 and the back substrate 30 so as to face the translucent substrate 10 after the manufacturing process of FIG. 2C. It is sectional drawing.

  2D shows a state where the sealing resin material 28 and the back substrate 30 are arranged on the exposed side of the output conductor 22 after the manufacturing process of FIG. 2C. After the manufacturing process of FIG. 2D, the sealing resin material 28 is melted and cured to manufacture the solar cell module 1 shown in FIG.

  That is, after the bus bar electrode 20 to which the output conductor 22 is connected is connected (electrically bonded) to the solar cell 15 (back surface conductive layer 13), the solar cell 15 (solar cell string 16) is protected from the external environment. Therefore, resin sealing is performed. The resin sealing is performed by laminating the back substrate 30 on the sealing resin material 28 disposed outside the output conductor 22 and then melting and curing the sealing resin material 28 to form the sealing portion 27 (see FIG. 1). It is given by that. The sealing resin material 28 is melted and cured by heating and pressurizing the sealing resin material 28 using a vacuum laminating apparatus or the like. The resin sealing manufacturing process will be further described with reference to FIG. 3C.

  The sealing portion 27 (sealing member 28) needs to fill a gap between the translucent substrate 10 and the back substrate 30. Therefore, the film thickness of the sealing member 28 is set in consideration of the thickness of the member between the translucent substrate 10 and the back substrate 30. In addition, since the film thickness of the photovoltaic cell 15 laminated | stacked on the translucent board | substrate 10 is about 5 microns at most, it can be disregarded compared with another structure.

  That is, the thickness of the gap to be filled is affected by the height Ht2 (about 230 to 300 μm). Therefore, assuming that the film thickness of the sealing portion 27 between the output conductor 22 and the back substrate 30 is about 100 μm, the film thickness of the sealing resin material 28 needs to be about 330 to 400 μm, for example.

  The sealing resin material 28 is preferably a resin having good adhesion to the light-transmitting substrate 10, the back substrate 30, the output conductor 22, the solar battery cell 15, and the like, and having weather resistance, such as EVA (ethylene vinyl acetate resin). ) Can be applied.

  FIG. 3A shows a manufacturing method of the solar cell module 1 according to the embodiment of the present invention before the bus bar electrode 20 to which the output conductor 22 is connected and the solar cell 15 (solar cell string 16) are connected to each other. It is a disassembled perspective view which decomposes | disassembles and shows this state.

  As described above, the bus bar electrode 20 and the output conductor 22 are formed of an elongated plate-like metal foil. A plurality of strip-shaped solar cells 15 (solar cell strings 16) are juxtaposed (formed) on the translucent substrate 10. Both ends (the solar cells 15 at the end) of the solar cell string 16 are regions where electric power from the solar cell string 16 is taken out.

  Therefore, the bus bar electrode 20 is disposed to face each of the solar cells 15 (back surface conductive layer 13) disposed at both ends of the solar cell string 16. In the solar cell module 1 according to the present embodiment, the output conductor 22 is connected to the bus bar electrode 20 in advance as described above.

  That is, in this embodiment, the bus bar electrode 20 and the output conductor 22 constitute a lead member, and the lead member is connected to the bus bar electrode 20 and the output conductor 22 before the bus bar electrode 20 is connected to the solar battery cell 15. Are connected in advance.

  With such a process, when the bus bar electrode 20 and the output conductor 22 are connected by soldering, for example, the molten solder affects (for example, damages) the solar battery cell 15 (back surface conductive layer 13) disposed around. For example, polyimide tape or the like (prior art) for protecting the back surface conductive layer 13 becomes unnecessary.

  For example, if one of the solar cell strings 16 is on the plus side, the other is on the minus side. Therefore, the bus bar electrode 20 and the output conductor 22 are arranged on the plus side and the minus side, respectively, and are arranged as a pair of bus bar electrodes 20 and a pair of output conductors 22. Since there is no need to distinguish between the plus side and the minus side in particular, both are indicated by the same reference numerals.

  The output conductor 22 is connected to the bus bar electrode 20 at a connection portion 22c facing the bus bar electrode 20, and an insulating film 24 is previously coated on the side facing the solar cell string 16 (solar cell 15). The output conductor 22 is connected in a direction intersecting with the bus bar electrode 20, and extends from a connection portion 22 c connected to the center of the bus bar electrode 20.

  The extended output conductor 22 includes a terminal portion 22t on the side opposite to the connection portion 22c, and the terminal portion 22t is a portion of the output conductor facing the solar cell string 16 for leading out (connection with the outside). 22 is bent in the vertical direction (outside). The terminal portion 22t can be formed by bending either before or after the bus bar electrode 20 and the output conductor 22 are connected. If the terminal portion 22 t is formed by bending before connecting the output conductor 22 to the bus bar electrode 20, it is possible to prevent the influence on the connection portion 22 c that is a joint portion between the bus bar electrode 20 and the output conductor 22.

  A conductive paste (not shown) is applied in advance to the back surface conductive layer 13 (solar cell 15). The conductive paste may be applied to the entire surface of the back surface conductive layer 13 facing the bus bar electrode 20 or may be applied intermittently.

  FIG. 3B is a perspective view showing a state in the manufacturing process in which the bus bar electrode 20 and the solar battery cell 15 are connected after the manufacturing process of the solar battery module 1 shown in FIG. 3A.

  The bus bar electrode 20 is connected (adhered) to the back surface conductive layer 13 via a conductive paste (cell connection portion 21; see FIG. 1) previously applied to the back surface conductive layer 13. Accordingly, the positive side and the negative side of the solar cell string 16 are led out to the pair of terminal portions 22t via the bus bar electrode 20 and the output conductor 22. The conductive paste may be continuously formed (coated) in the length direction of the back surface conductive layer 13 or may be intermittently formed (coated).

  In addition, the cell connection part 21 can also be formed with an anisotropic conductive paste, an anisotropic conductive film, or the like.

  FIG. 3C is an exploded perspective view showing the sealing resin material 28 and the back substrate 30 disposed to face the translucent substrate 10 after the manufacturing process of the solar cell module 1 shown in FIG. 3B. .

  After the manufacturing process of FIG. 3B, the sealing resin material 28 and the back substrate 30 are disposed on the back surface side of the solar cell module 1. In the sealing resin material 28, an opening 28h that penetrates the terminal portion 22t is formed in advance, and in the back substrate 30, an opening 30h that penetrates the terminal portion 22t is formed in advance. A sealing resin material 28 that covers the translucent substrate 10 (solar cell string 16, bus bar electrode 20, output conductor 22) and seals the solar cell string 16 with resin is disposed, and covers the sealing resin material 28 and the back substrate. 30 is arranged.

  After the sealing resin material 28 and the back substrate 30 are overlaid on the translucent substrate 10, a vacuum laminating device (not shown) is applied to heat and pressurize (melt and cure) the sealing resin material 28. The sealing part 27 is formed, and the solar cell module 1 is formed. That is, the solar cell module 1 is laminated on the translucent substrate 10 to seal (protect) the solar cells 15 (solar cell strings 16), and covers the sealing portion 27 so as to be translucent. And a back substrate 30 disposed to face the substrate 10.

  FIG. 4A is a cross-sectional view showing the output conductor 22 and the insulating film 24 applied to the solar cell module 1 according to the embodiment of the present invention in a cross-sectional state in the length direction including the connecting portion 22c.

  An insulating film 24 is preferably formed on the output conductor 22 in advance. With this configuration, when the output conductor 22 is arranged to face the solar battery cell 15 (solar battery string 16), the insulating film 24 is not displaced, so the output conductor 22 faces the solar battery 15 with high accuracy. Can be arranged.

  That is, in the solar cell module 1, the insulating film 24 preferably covers (adheres to the facing surface) the surface of the output conductor 22 that faces the solar battery cell 15. Therefore, the solar cell module 1 according to the present embodiment easily ensures the height Ht2 (see FIG. 1) of the output conductor 22 from the solar cell 15 and the insulation of the output conductor 22 with respect to the solar cell 15; The height Ht1 of the output conductor 22 from the solar battery cell 15 at the connection position (connection portion 22c) can be suppressed with high accuracy.

  4B is a cross-sectional view illustrating a cross-sectional state of the bus bar electrode 20 connected to the connection portion 22c of the output conductor 22 illustrated in FIG. 4A.

  4C is a cross-sectional view illustrating a cross-sectional state when the output conductor 22 (connection portion 22c) illustrated in FIG. 4A and the bus bar electrode 20 illustrated in FIG. 4B are connected via the conductor connection portion 23.

  The bus bar electrode 20 is connected to the solar battery cell 15 (back surface conductive layer 13) via the cell connection portion 21 (see FIG. 1). Accordingly, the bus bar electrode 20 has a shape corresponding to the back surface conductive layer 13 (see FIG. 3A). The bus bar electrode 20 and the output conductor 22 are arranged in an intersecting state, and a connection portion 22 c formed at the end of the output conductor 22 is connected (adhered) to the center portion of the bus bar electrode 20 via the conductor connection portion 23. (See FIG. 3A).

  The connection of the output conductor 22 to the bus bar electrode 20 is connected via the conductor connection portion 23. As described above, the conductor connection portion 23 is preferably formed by applying a pulse heater. By connecting by the pulse heater method, the thickness of the conductor connecting portion 23 is controlled with high accuracy, and as a result, the height Ht1 (see FIG. 1) of the output conductor 22 from the solar battery cell 15 is suppressed with high accuracy. it can.

  FIG. 5A is a cross-sectional view showing a cross-sectional state in the arrow XX direction of the output conductor 22 and the insulating film 24 shown in FIG. 4C.

  Since the output conductor 22 is plate-shaped, the cross section in the direction (short direction) intersecting the length direction of the output conductor 22 is rectangular, and one surface of the output conductor 22 is connected to the solar cell 15. It arrange | positions so that it may oppose. In addition, an insulating film 24 is coated on the surface of the output conductor 22 facing the solar battery cell 15. That is, the insulating film 24 only needs to insulate the output conductor 22 from the solar battery cell 15 (solar battery string 16), and to ensure a constant position of the output conductor 22 (height Ht2 from the solar battery cell 15). Therefore, the output conductor 22 only needs to be disposed (covered or bonded) only on the side (bottom surface) facing the solar battery cell 15.

  FIG. 5B is a cross-sectional view showing a modification of the output conductor 22 and the insulating film 24 shown in FIG. 5A.

  Although FIG. 5A shows an embodiment in which the insulating film 24 is formed only on one surface of the output conductor 22 (surface facing the solar battery 15), the insulating film 24 is formed on the upper surface (back substrate) of the output conductor 22. 30 may be formed on a surface other than 30). According to this modification, it is possible to further improve the insulation with respect to the surroundings without changing the height Ht2 of the output conductor 22. Note that the insulating film 24 on the side surface may be extended from the bottom surface to the middle of the side surface.

  As shown in FIGS. 2A to 5B, the method for manufacturing the solar cell module 1 according to the present embodiment is a process of forming a plurality of solar cells 15 on one surface of the light-transmitting substrate 10 (see FIGS. 2A and 3A). ), A bus bar electrode 20 that collects power from the solar battery cell 15 (solar battery string 16), and an output conductor 22 that outputs power to the outside (see FIGS. 2B and 3A), and an output conductor 22 A step of connecting the bus bar electrode 20 to which the output conductor 22 is connected to any one of the plurality of solar cells 15 in a state where the insulating film 24 is disposed between the solar cells 15 (see FIGS. 2C and 3B). The film thickness Tr of the insulating film 24 is larger than the distance Dis from the solar cell 15 to the output conductor 22 at the connection position (connecting portion 22c) where the bus bar electrode 20 and the output conductor 22 are connected. Characterized and (see FIG. 1, FIG. 2D).

  Therefore, in the manufacturing method of solar cell module 1 according to the present embodiment, bus bar electrode 20 and solar cell 15 (back surface conductive layer 13) are connected to bus bar electrode 20 and output conductor 22 in advance in a state where connection portion 22c is connected. Compared to the conventional method of connecting the output conductor 22 to the bus bar electrode 20 after connecting the bus bar electrode 20 to the solar cell 15, the solar battery cell when connecting the output conductor 22 to the bus bar electrode 20. The influence on 15 (back surface conductive layer 13) can be eliminated, and damage to solar battery cell 15 (back surface conductive layer 13) can be reduced. That is, according to the method for manufacturing solar cell module 1 according to the present embodiment, the yield can be improved and the production cost can be reduced.

  Moreover, the manufacturing method of the solar cell module 1 which concerns on this Embodiment is the edge part (connection part 22c) of the output conductor 22 in the connection part 22c (conductor connection part 23) where the bus-bar electrode 20 and the output conductor 22 are connected. Since it is possible to easily manufacture the solar cell module 1 capable of suppressing the generation of strain due to the presence of the slag or the accumulation of internal stress, the productivity is improved.

  That is, since the output conductor 22 (connection portion 22c) is reduced in height, when the solar battery cell 15 disposed between the translucent substrate 10 and the back substrate 30 is resin-sealed by the sealing portion 27, the transparent conductor 10 is transparent. The distortion (for example, glass crack) of the translucent board | substrate 10 and the back substrate 30 can be prevented by suppressing the distortion which concerns on the optical substrate 10 and the back substrate 30.

  The solar cell module 1 and the method for manufacturing the solar cell module 1 according to the present embodiment have been mainly described above. However, the present embodiment is not limited to the solar cell module 1 and the method for manufacturing the solar cell module 1 described above, and can be understood as an invention as described below.

  That is, in the method for manufacturing solar cell module 1 according to the present embodiment, the solar cell module 1 is connected to any one of the plurality of solar cells 15 formed on one surface of the light-transmitting substrate 10 and the plurality of solar cells 15. A method of manufacturing a solar cell module 1 including a bus bar electrode 20 that collects electric power from a battery cell 15 and an output conductor 22 that is connected to the bus bar electrode 20 and outputs electric power to the outside. Before connecting to the bus bar 15, it is preferable to connect the bus bar electrode 20 and the output conductor 22 in advance.

  With this configuration, the method for manufacturing solar cell module 1 according to the present embodiment makes it possible to connect bus bar electrode 20 to solar cell 15 in a state where bus bar electrode 20 and output conductor 22 are connected in advance. In addition, it is possible to eliminate the influence on the solar battery cell 15 (for example, damage to the back surface conductive layer 13) by connecting the bus bar electrode 20 and the output conductor 22.

  Further, in the method for manufacturing solar cell module 1 according to the present embodiment, terminal portion 22t of output conductor 22 is separated from solar cell 15 before bus bar electrode 20 is connected to solar cell 15 (specifically). Specifically, as described with reference to FIG. 3A, it is preferably bent in advance in the vertical direction toward the outside with respect to the output conductor 22.

  With this configuration, the method for manufacturing solar cell module 1 according to the present embodiment improves workability because there is no need to bend output conductor 22 after connecting bus bar electrode 20 to solar cell 15, and The influence on the solar battery cell 15 by the process of bending the output conductor 22 (damage due to mechanical force (stress) applied to the solar battery cell 15 when the output conductor 22 is bent to form the terminal portion 22t) can be eliminated.

  In addition, the lead member according to the present embodiment is connected to one of the plurality of solar cells 15 formed on one surface of the translucent substrate 10 and the plurality of solar cells 15, and is connected to the solar cells 15. A lead member applied to a solar cell module 1 including a bus bar electrode 20 that collects electric power and an output conductor 22 that is connected to the bus bar electrode 20 and outputs electric power to the outside. The bus bar electrode 20 and the output conductor 22 are It is preferable to be connected in advance.

  With this configuration, the lead member (an assembly of the bus bar electrode 20 and the output conductor 22 in a pre-connected state) according to the present embodiment has the bus bar electrode 20 in a state in which the bus bar electrode 20 and the output conductor 22 are connected in advance. It becomes possible to connect to the solar battery cell 15, and it becomes possible to eliminate the influence (same as above) on the solar battery cell 15 by connecting the bus bar electrode 20 and the output conductor 22.

  In the lead member according to the present embodiment, the terminal portion 22t of the output conductor 22 is bent in advance in a direction away from the solar battery cell 15 before the bus bar electrode 20 is connected to the solar battery cell 15. Is preferred.

  With this configuration, the lead member according to the present embodiment does not need to bend the output conductor 22 after the bus bar electrode 20 is connected to the solar battery cell 15, thereby improving workability and bending the output conductor 22. The influence (same as before) on the solar battery cell 15 by this can be eliminated.

DESCRIPTION OF SYMBOLS 1 Solar cell module 10 Translucent board | substrate 11 Translucent conductive layer 12 Photovoltaic layer 13 Back surface conductive layer 15 Solar cell 16 Solar cell string 20 Bus-bar electrode (lead member)
21 Cell connection 22 Output conductor (lead member)
22c connection part 22t terminal part 23 conductor connection part 24 insulating film 27 sealing part 28 sealing resin material 28h opening part 30 back substrate 30h opening part Dis spacing Ht1, Ht2 height Tr film thickness

Claims (11)

A translucent substrate;
A plurality of solar cells formed on one surface of the translucent substrate;
A bus bar electrode connected to any of the plurality of solar cells and collecting power from the solar cells;
An output conductor connected to the bus bar electrode and outputting the power to the outside;
An insulating film disposed between the output conductor and the solar cell,
The solar cell module, wherein a thickness of the insulating film is larger than a distance from the solar cell to the output conductor at a connection position where the bus bar electrode and the output conductor are connected. The solar cell module according to claim 1,
The said insulating film has coat | covered the surface facing the said photovoltaic cell of the said output conductor. The solar cell module characterized by the above-mentioned. The solar cell module according to claim 1 or 2, wherein
The translucent substrate and the back substrate are formed of a glass plate. The solar cell module according to any one of claims 1 to 3, wherein
The solar cell module, wherein a conductor connection portion that connects the bus bar electrode and the output conductor at the connection position is formed by soldering using a pulse heater. The solar cell module according to any one of claims 1 to 4, wherein:
The cell connection part which connects the said photovoltaic cell and the said bus-bar electrode is formed with the electrically conductive paste. The solar cell module characterized by the above-mentioned. The solar cell module according to any one of claims 1 to 5, wherein
The solar cell module is a thin-film solar cell including a translucent conductive layer, a photovoltaic layer, and a back conductive layer from the translucent substrate side. Forming a plurality of solar cells on one surface of the translucent substrate;
Connecting a bus bar electrode that collects electric power from the solar battery cell and an output conductor that outputs the electric power to the outside;
Connecting the bus bar electrode to which the output conductor is connected to any of the plurality of solar cells, with an insulating film disposed between the output conductor and the solar cell,
The method for manufacturing a solar cell module, wherein the thickness of the insulating film is larger than a distance from the solar cell to the output conductor at a connection position where the bus bar electrode and the output conductor are connected. A plurality of solar cells formed on one surface of the translucent substrate, a bus bar electrode that is connected to any of the plurality of solar cells and collects power from the solar cells, and is connected to the bus bar electrode and A method of manufacturing a solar cell module comprising an output conductor that outputs electric power to the outside,
Before connecting the said bus-bar electrode to the said photovoltaic cell, the said bus-bar electrode and the said output conductor are connected previously. The manufacturing method of the solar cell module characterized by the above-mentioned. It is a manufacturing method of the solar cell module according to claim 8,
The method of manufacturing a solar cell module, wherein the terminal portion of the output conductor is bent in advance in a direction away from the solar cell before the bus bar electrode is connected to the solar cell. A plurality of solar cells formed on one surface of the translucent substrate, a bus bar electrode that is connected to any of the plurality of solar cells and collects power from the solar cells, and is connected to the bus bar electrode and A lead member applied to a solar cell module comprising an output conductor that outputs electric power to the outside,
A lead member, wherein the bus bar electrode and the output conductor are connected in advance. The lead member according to claim 10,
The lead member, wherein the terminal portion of the output conductor is bent in advance in a direction away from the solar battery cell before the bus bar electrode is connected to the solar battery cell.

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