TW201417320A - Solar cell module, and method for producing same - Google Patents

Abstract

Provided is a solar cell module having multiple solar cells on which five or more tub lines are formed. Also provided is a method for producing said solar cell module. Solar cells are placed on wiring sheets, to which bus bar electrodes are provided, and a contact is formed between the solar cells and the bus bar electrodes wired on the wiring sheets. Therefore, there is no need to use a solder ribbon when connecting solar cells in series or to use a heating device for heating the solder ribbon as was the case in prior art. As a consequence, the number of tab lines formed on the solar cells is no longer restricted by the number of heating devices, and it is possible to produce a solar cell module having multiple solar cells on which five tab lines are formed.

Description

Solar battery module and manufacturing method thereof Field of invention

The present invention relates to a solar cell module having a plurality of solar cell batteries, and more particularly to a solar cell module and a method of fabricating the same, which are provided with more marking lines for wiring the solar cell.

Background of the invention

As shown in Patent Documents 1 and 2, there is a solar battery module in which a plurality of solar battery cells arranged in series are connected in series. The solar cell module is manufactured, for example, by a metal electrode forming step of forming a marking line (bus bar electrode) or a marking line and a finger electrode on the front surface and the back surface of the solar cell battery; Between adjacent solar cell batteries, a marking line formed on the surface of a solar cell battery by the metal electrode forming step is formed by, for example, a solder ribbon of a strip-shaped metal foil which is applied by welding The metal electrode forming step is formed by electrically connecting the marking lines on the back surface of the other solar battery cell; and the laminating step is to laminate the sealing material sheets into the plurality of solar battery groups electrically connected in series by the welding strip. a sealing material sheet on both sides of the battery and having a glass or a transparent resin laminated on the light receiving surface side of the sealing material sheets, and Laminating the back sheet or the transparent resin on the sealing sheet opposite to the light-receiving side of the sealing material sheet; and the laminating step of laminating the laminated body laminated by the laminating step with the above-mentioned sealing machine The sheet material is thermocompression bonded into one. In the subsequent step of the solder ribbon, for example, when two marking lines are formed on both sides of the solar cell, two soldering strips are disposed on the two marking lines, and two heating devices are provided. The heating unit simultaneously heats the two strips so that the two strips are connected to the two marking lines. Further, the marking line is for appropriately collecting the electric power generated by the solar battery cell and connected to the electrode on the surface or the back surface of the solar battery cell and extending in one direction. Further, the finger electrode transmits electricity generated by the solar battery cell to the metal wire of the marking line, and the metal wire extends in a vertical direction with respect to the marking line.

Prior technical literature Patent literature

Patent Document 1: JP-A-2010-287688

Patent Document 2: JP-A-2012-119458

Summary of invention

Further, in the solar cell module as described above, in order to increase the conversion efficiency and reduce the resistance of the solar cell battery, the number of mark lines should be increased. However, when three or four marking lines are added to both sides of the solar battery, the heating means for simultaneously heating the welding strips disposed on the marking lines in the subsequent step of the welding strip requires three or four. So it must The foregoing heating device is required to be provided in accordance with the number of the marking lines, and the space for providing the plurality of heating devices to the heating unit is limited in the size of the solar battery cells (for example, 156 mm × 156 mm). Therefore, in the prior art, it is very difficult to manufacture a solar cell module having a plurality of solar battery cells in which five or more marking lines are formed.

The present invention has been made in view of the above-described actual circumstances, and an object thereof is to provide a solar battery module having a plurality of solar battery cells in which five or more marking lines are formed, and a method of manufacturing the same.

As a result of repeating various studies based on the above facts, the present inventors have found that by using the aforementioned marking line as a metal electrode or the marking line and the finger electrode wiring on a transparent sheet as a sealing material. The pair of wiring sheets are formed, and the solar battery cells are disposed between the pair of wiring sheets to be thermocompression bonded, and the solar battery can be formed even if the welding tape subsequent step is not conventionally performed. The assembled battery and the wiring are electrically connected in series between the aforementioned metal electrodes on the transparent sheet. The present invention has been made in light of the above findings.

In order to achieve the above object, the solar cell module of the present invention is mainly directed to a solar cell module, characterized in that: (a) a solar cell battery is disposed on a transparent sheet provided with a metal electrode, and the solar cell battery a contact is formed between the metal electrode on the transparent sheet and the wiring; (b) the metal electrode has a function of a mark line; and (c) a strip of the mark line on the surface of the solar cell The number is more than five.

A solar cell module according to the present invention: (a) a solar cell battery is disposed on a transparent sheet on which a metal electrode is disposed, and the solar cell battery and the wiring are formed between the metal electrodes on the transparent sheet (b) the metal electrode has a function of a mark line; (c) the number of the mark lines on the surface of the solar cell battery is five or more. Therefore, since the solar cell is disposed on the transparent sheet on which the metal electrode is disposed, and the solar cell and the wiring form a contact between the metal electrodes on the transparent sheet, it is not necessary to The solar cell batteries are used in series with each other, and it is not necessary to use a heating device that heats the ribbon. Thereby, the number of the marking lines formed in the solar battery cells is not limited by the number of the heating devices, so that a solar battery module having a plurality of solar battery cells forming five or more marking lines can be manufactured.

Here, the present invention is preferably: (a) on both sides of the solar cell battery, one of the metal electrodes is disposed on the transparent sheet and the pair of transparent plates are laminated to form the metal electrode contacting the two sides of the solar cell battery By heating while pressing, a contact state between the solar cell and the metal electrode can be obtained; and (b) a spacer composed of an insulating composition is disposed between the pair of transparent sheets. Therefore, when the laminated body including the solar cell, the pair of transparent sheets, and the pair of transparent plates is pressed and heated, the spacer can be added to the solar cell by the spacer. The load of the battery pack prevents the rupture of the aforementioned solar battery cells.

Moreover, the present invention is preferably: (a) in the aforementioned solar battery cell On both sides, one of the metal electrodes is disposed so that the transparent sheet is laminated so that the metal electrode contacts both sides of the solar cell, and a transparent plate is laminated on the surface side, and the back sheet is laminated on the back side, and the pressing is performed simultaneously. By heating, a contact state between the solar cell and the metal electrode can be obtained; and (b) a spacer composed of an insulating composition is disposed between the pair of transparent sheets. Therefore, when the laminated body including the solar cell, the pair of transparent sheets, the transparent plate, and the back sheet is pressed and heated, the spacer can be reduced by the spacer. The load of the solar cell battery described above prevents the solar cell battery from being broken.

Further, since the metal electrode is preferably required to have a function of a mark line and a finger, the electric resistance of the solar cell battery can be appropriately reduced.

Further, the metal electrode is preferably a metal wire, a metal foil, a thermosetting conductive composition, or a low melting point alloy, and the metal electrode can be appropriately wired on the transparent sheet.

Further, the metal electrode composed of the metal wire or the metal foil is preferably fixed to the transparent sheet by a thermosetting transparent adhesive or a thermosetting transparent adhesive containing conductive fine particles, so that the metal wire can be used. Or the metal electrode formed of the metal foil is appropriately wired on the transparent sheet.

Further, the metal electrode composed of the thermosetting conductive composition is preferably formed by printing a composition composed of metal particles and a binder resin and drying it, so that it can be composed of the aforementioned thermosetting conductive material. The aforementioned metal electrode composed of the object is appropriately wired on the aforementioned transparent sheet on.

Further, the metal electrode having the function of the mark line preferably has a line width of 0.8 mm or less and an aspect ratio of 1/7 or more. Therefore, the shadow area of the aforementioned marking line on the solar cell battery can be appropriately reduced, and the electric resistance of the solar cell can be appropriately reduced.

Further, the number of the metal electrodes having a finger function is preferably 70 or more, the line width is 80 μm or less, and the aspect ratio is 1/7 or more. Therefore, the shadow area of the aforementioned finger on the solar cell battery can be appropriately reduced, and the electric resistance of the solar cell can be appropriately reduced.

Further, the transparent sheet is preferably a sealing material, that is, PVB or EVA, so that the durability of the solar cell module can be appropriately improved, and the solar cell battery is preferably a twin solar cell battery or a heterojunction type. Solar battery cells, and compounds such as CIGS are solar battery cells. Therefore, it is possible to suitably use five or more marking lines of a silicon germanium solar cell, a heterojunction solar cell, and a compound solar cell battery wiring such as CIGS.

Further, the transparent plate is preferably a transparent glass or resin. Therefore, for example, among the light received by the solar cell module, a part of the light received by the spacer may be reflected to the transparent glass or the resin, and may be incident on the solar cell.

Moreover, it is preferable to manufacture the solar cell module by the following manufacturing method: when the heating and pressure bonding of the laminated body which consists of said solar cell, the transparent sheet, and the said transparent board is superposed, it is press|compressed and heated. And formed once. Therefore, it is not necessary to use the welding tape to connect the solar battery cells to each other. The soldering strips in series are followed by the step, and the heating device for heating the soldering strip is not required, so that the number of marking lines formed in the solar cell battery is not limited by the number of the heating devices, and can be manufactured with a plurality of formed Solar cell module for solar cell batteries with more than 5 marking lines.

10‧‧‧Solar battery module

12, 60‧‧‧ solar battery cells

12a, 60c‧‧‧ surface

12b, 60d‧‧‧back

14, 59‧‧‧ metal electrodes

14a, 14a', 14a", 14a''', 42, 44, 48, 56, 62, 66‧‧‧ bus electrodes

14b, 52, 64‧‧‧ finger electrodes

14c, 42a, 44a, 48a, 56a‧‧‧ Connections

16a, 16b, 40, 46, 50, 54‧‧‧ wiring sheets (transparent sheets)

18, 20‧‧‧ glass

22, 68‧‧‧ spacers

22a‧‧‧ vertical frame

22b‧‧‧ transverse frame

24, 70‧‧‧ battery storage space

26, 72‧‧‧ Insert space

28‧‧‧n type crystal system substrate

28a, 28b‧‧‧n-type crystal system 两 substrate 28 on both sides

30‧‧‧ Film amorphous layer

32‧‧‧Transparent electrode

36‧‧‧Layered body

58‧‧‧Anti-reflective film

60a‧‧n semiconductor

60b‧‧‧p-type semiconductor

A‧‧‧ size

B, C‧‧‧ equal intervals

D‧‧‧ spacer thickness

E‧‧‧Width

P1~P21‧‧‧ steps

X, X'‧‧‧ line width

Y, Y'‧‧‧ height

II, XI, XII‧‧‧ section line

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view showing a properly applied solar cell module of the present invention.

Figure 2 is a cross-sectional view taken along line II-II of Figure 1.

3 is a cross-sectional view showing the cross-sectional shape of the bus bar electrode of the solar cell module of FIG. 1.

4 is a cross-sectional view showing the cross-sectional shape of the finger electrode of the solar cell module of FIG. 1.

Fig. 5 is a view showing the steps of a method of manufacturing the solar cell module of Fig. 1.

Fig. 6 is a view for explaining a solar cell battery forming step in the manufacturing method of Fig. 5.

Fig. 7 is a view for explaining a manufacturing process of the wiring sheet in the manufacturing method of Fig. 5, which shows a wiring sheet which is disposed on the surface side of the solar battery cell of Fig. 1 in the solar battery module.

Fig. 8 is a view for explaining a manufacturing process of the wiring sheet in the manufacturing method of Fig. 5, which shows a wiring sheet which is disposed on the back side of the solar battery cell of Fig. 1 in the solar battery module.

Fig. 9 is a view for explaining a manufacturing step of the wiring sheet in the manufacturing method of Fig. 5, which shows a state in which the wiring sheet of Fig. 8 is provided with a spacer.

Figure 10 is a view showing a step of laminating in the manufacturing method of Figure 5, which shows Fig. 9 is a laminate of a wiring sheet laminated solar battery cell.

Figure 11 is a cross-sectional view taken along line XI-XI of Figure 10 illustrating the lamination step in the manufacturing method of Figure 5, showing the state in which the build-up volume layer of Figure 10 has the wiring sheet of Figure 7.

Fig. 12 is a cross-sectional view taken along the line XII-XII of Fig. 10 showing the lamination step in the manufacturing method of Fig. 5, showing the state in which the build-up volume layer of Fig. 10 has the wiring sheet of Fig. 7.

Fig. 13 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell.

Figure 14 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell, etc., which shows a solar cell battery having a width of 20 μm and the same number of fingers. Next, the increase in conversion efficiency when the bus electrode is changed from 3 to 5.

Figure 15 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell, etc., which shows a solar cell battery having a width of 40 μm and the same number of fingers. Next, the increase in conversion efficiency when the bus electrode is changed from 3 to 5.

Figure 16 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell, etc., which shows a solar cell battery having a width of 60 μm and the same number of fingers. Next, the increase in conversion efficiency when the bus electrode is changed from 3 to 5.

Figure 17 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell, etc., which shows a solar cell battery having a width of 80 μm and the same number of fingers. Next, mother The increase in conversion efficiency when the line electrode is changed from 3 to 5.

Figure 18 is a graph showing the relationship between the number of bus bar electrodes formed in a solar cell battery and the conversion efficiency of the solar cell, etc., which shows a solar cell battery having a width of 100 μm and the same number of fingers. Next, the increase in conversion efficiency when the bus electrode is changed from 3 to 5.

Fig. 19 is a view showing a solar battery module according to another embodiment of the present invention, which is a cross-sectional view showing a sectional shape of a bus bar electrode provided in the solar battery module.

Fig. 20 is a view showing a solar battery module according to another embodiment of the present invention, which is a cross-sectional view showing a sectional shape of a bus bar electrode provided in the solar battery module.

Fig. 21 is a view showing a solar battery module according to another embodiment of the present invention, which is a cross-sectional view showing a sectional shape of a bus bar electrode provided in the solar battery module.

Fig. 22 is a view showing a solar battery module according to another embodiment of the present invention, which shows a wiring sheet disposed on the back side of the solar battery unit in the solar battery module.

Fig. 23 is a view showing a solar battery module according to another embodiment of the present invention, which shows a wiring sheet disposed on the surface side of the solar battery cell provided in the solar battery module.

Fig. 24 is a view showing a wiring sheet which is disposed on the back side of the solar battery unit in Fig. 23, which is provided in the solar battery module.

Figure 25 is a view showing a solar battery module according to another embodiment of the present invention, which is shown in the solar battery module and is disposed in a solar battery unit. Wiring sheet on the surface side.

Fig. 26 is a view showing the solar battery unit of Fig. 25 provided in the solar battery module.

Fig. 27 is a view showing the steps of a method of manufacturing the solar battery module of Fig. 25.

Figure 28 is a view showing a solar battery module according to another embodiment of the present invention, which shows a solar battery unit provided in the solar battery module.

Fig. 29 is a view showing the steps of a method of manufacturing the solar battery module of Fig. 28.

Figure 30 is a view showing a solar battery module according to another embodiment of the present invention, which shows a spacer provided in the solar battery module.

Form for implementing the invention

An embodiment of the present invention will be described in detail below with reference to the drawings. However, in the following embodiments, the drawings have been appropriately simplified or deformed, and the dimensional ratios, shapes, and the like of the respective portions are not necessarily correctly depicted.

Example 1

Fig. 1 is a view showing a solar cell module 10 to which the present invention is suitably applied. As shown in FIG. 1 , the solar cell module 10 is formed in a long flat shape and is received by the solar cell module 10 by receiving light on one or both sides of the solar cell module 10 (this embodiment). In the middle of the 6) solar cell battery 12 generator. On the other hand, the solar battery cell 12 is, for example, a hybrid battery (HIT type) solar battery cell in which a wafer and an amorphous germanium layer are combined, and two sides of the solar cell 12 are exposed to light by at least one of the two surfaces 12a and 12b. Subject to Light type solar battery.

As shown in FIG. 1, a plurality of solar battery cells 12 are respectively square, and the size of the solar battery cells 12, that is, the size A is, for example, 156 mm, and electrodes of the two faces 12a and 12b of the solar battery cell 12 are connected with, for example, 5 The bus bar electrode 14a has a function of extending in the longitudinal direction of the solar cell module 10 and having a mark line. On the other hand, the marking line is a metal wire which is appropriately collected by the electricity generated by the solar battery cell 12.

As shown in Fig. 1, the five bus bar electrodes 14a connected to the solar battery cells 12 are arranged at equal intervals B, for example, 30.6 mm, in the vertical direction of the solar cell module 10 with respect to the longitudinal direction. As shown in FIG. 2, between the solar cell 12 adjacent to the long side of the solar cell module 10, the surface 12a of one solar cell 12 and the back 12b of another solar cell 12 are supported by a bus bar. The electrodes 14a are electrically connected, that is, a plurality of solar battery cells 12 are connected in series by the bus bar electrodes 14a.

The bus bar electrode 14a is shown in FIG. 3. The bus bar electrode 14a has a rectangular cross section, and the aspect ratio Y/X of the line width X and the height Y is, for example, 1/2 (the line width X is the cross section of the bus bar electrode 14a). In the present embodiment, the bus bar electrode 14a is designed to have an aspect ratio Y/X of 1/7 or more and preferably 1/7 or more to 7/4 or less. section.

As shown in Fig. 1, for example, 90 finger electrodes 14b are connected to the electrodes of both faces 12a and 12b of the solar cell 12, and the finger electrodes 14b are orthogonal to the bus bar electrodes 14a and have a function of a finger. On the other hand, the above-mentioned finger system supplies electric power generated by the solar battery cell 12 to the metal wire of the bus bar electrode 14a. Also, in the present embodiment, the present embodiment can be understood relatively easily. For example, the number of the finger electrodes 14b connected to the solar battery cell 12 and the size thereof are illustrated in a manner different from the actual article.

As shown in FIG. 1, the 90 finger electrodes 14b connected to the solar battery cell 12 are disposed at equal intervals C, for example, 1.64 mm, in the longitudinal direction of the solar cell module 10. Further, the finger electrode 4b is as shown in FIG. 4, the finger electrode 14b has a rectangular cross section, and the aspect ratio Y'/X' of the line width X' and the height Y' is a section of the finger electrode 14b. For example, 1/2 (when the line width X' is 40 μm and the height Y' is 20 μm), in the present embodiment, the aspect ratio Y'/X' is 1/7 or more and desirably 1/7 or more and ~7/ The cross section of the finger electrode 14b is designed within the range of 4 or less.

As shown in FIG. 2, a plurality of solar battery cells 12 are respectively disposed, for example, by a laminating machine, a pair of wiring sheets (transparent sheets) 16a disposed on both sides 12a and 12b of the plurality of solar battery cells 12, 16b is thermocompression-bonded and sealed in the wiring sheets 16a and 16b, and the pair of wiring sheets 16a and 16b are respectively provided with transparent glass 18 and 20, and the pair of wiring sheets 16a and 16b are made of, for example, EVA ( A sealing material such as ethylene vinyl acetate copolymer resin or PVB (polyvinyl butyral). On the pair of wiring sheets 16a and 16b, the metal electrodes 14 such as the bus bar electrodes 14a and the finger electrodes 14b are preliminarily wired.

As shown in Fig. 2, a pair of elongated spacers 22 are provided in the thermocompression bonded wiring sheets 16a, 16 between the pair of wiring sheets 16a, 16, and the pair of spacers 22 are composed of insulation. The material is composed of, for example, ceramic or a mixture of ceramic and resin. The strip-shaped spacer 22 is shown in FIG. 1 by a pair of vertical frame portions 22a extending in the longitudinal direction of the solar cell module 10, and a plurality of In the embodiment, the horizontal frame portion 22b of the seven pieces is formed, and the plurality of horizontal frame portions 22b extend in the vertical direction with respect to the vertical frame portion 22a, and the pair of vertical frame portions 22a are connected to the both end portions. Moreover, the assembled battery storage space 24 and the insertion space 26 are provided in the elongated spacer 22, and the assembled battery storage space 24 accommodates a plurality of the plurality of vertical frame portions 22a and the plurality of horizontal frame portions 22b (this embodiment) The middle is three solar battery cells 12, and the insertion space 26 is for inserting the bus electrode 14a surrounded by the pair of vertical frame portions 22a and the plurality of horizontal frame portions 22b. Further, in the assembled battery storage space 24, the interval between the pair of vertical frame portions 22a and the interval between the horizontal frame portions 22b adjacent to the longitudinal direction of the solar cell module 10 are the same as the size A of the solar battery cells 12. Or slightly larger than the size A of the solar battery cell 12. Further, as shown in FIG. 2, the thickness D of the spacer 22 is the same as or thicker than the thickness of the solar cell 12 .

Hereinafter, a method of manufacturing the solar battery module 10 having a plurality of solar battery cells 12 in which five bus bar electrodes 14a are formed will be described with reference to FIGS. 5 to 12. As shown in FIG. 6, first, in the solar cell formation step P1 of FIG. 5, a thin film amorphous germanium layer 30 composed of an i-type amorphous germanium layer and a p-type amorphous germanium layer is laminated on a single crystal germanium or polycrystalline germanium. The both surfaces 28a and 28b of the n-type germanium substrate 28 composed of an isotactic semiconductor are integrated, and a transparent electrode 32 made of ITO (indium tin oxide) is laminated on the thin film amorphous layer 30. Thereby, the solar cell battery 12 can be formed.

Next, in the wiring sheet manufacturing step P2 of FIG. 5, as shown in FIG. 7, the metal electrode 14 such as the resin sheet wiring bus bar electrode 14a and the finger electrode 14b which are formed of, for example, EVA, is formed in a long flat shape. The wiring sheet 16a is manufactured, and as shown in FIG. 8, a resin composed of EVA is formed in a long flat plate shape. The metal wiring 14 such as the sheet wiring bus bar electrode 14a and the finger electrode 14b is manufactured to manufacture the wiring sheet 16b. The connection portion 14c is formed integrally with the bus bar electrode 14a, and the connection portion 14c extends in the vertical direction with respect to the longitudinal direction of the wiring sheets 16a and 16b. In FIG. 5, the next step of the solar battery cell forming step P1 is to perform the wiring sheet manufacturing step P2, and the solar battery cell forming step P1 may be performed, for example, in the next step of the wiring sheet manufacturing step P2.

In the wiring sheet manufacturing step P2, the metal wire or the metal foil is fixed to the wiring sheets 16a, 16b or the metal particles by a thermosetting transparent adhesive or a thermosetting transparent adhesive containing conductive fine particles. For example, Cu, Ag, Ni, Al, and the like, and a thermosetting conductive composition composed of a binder resin (thermosetting resin) are printed on the wiring sheets 16a and 16b and dried, whereby the metal electrode 14 is wired. Wiring sheets 16a, 16b. Further, a low melting point alloy such as a lead-free solder alloy may be used instead of the above metal wire or metal foil. Further, the lead-free solder alloy includes, for example, a base alloy and a lead-free solder alloy of gallium, and the base alloy has a nano-composite structure and contains tin and antimony. Further, the content of the gallium is in the range of 0.001 to 3% by weight based on the total amount of the lead-free solder alloy.

Further, in the wiring sheet manufacturing step P2, for example, a pair of spacers 22 are produced by hardening an insulating composition such as ceramic or a mixture of a resin and a ceramic by printing or extrusion molding, and as shown in FIG. For example, the pair of spacers 22 are fixed to the wiring sheet 16b by an adhesive, that is, integrally fixed to the bus bar electrode 14a and the finger electrode 14b of the wiring sheet 16b. Moreover, in the wiring sheet manufacturing step P2, the strip is stripped The flat transparent glass 18, 20 or the long flat transparent resin is fixed to the wiring sheets 16a and 16b by, for example, an adhesive. Further, the pair of spacers 22 are not necessarily fixed to the wiring sheet 16b, and a pair of spacers 22 may be laminated on the wiring sheet 16b in the laminating step P3 to be described later. Further, the glass sheets 18 and 20 are not necessarily fixed to the wiring sheets 16a and 16b, and the glass sheets 18 and 20 may be laminated on the wiring sheets 16a and 16b in the laminating step P3 to be described later.

Next, in the laminating step P3 of FIG. 5, as shown in FIG. 10, the solar cell battery 12 is laminated to the wiring sheet in which the glass 20 and the pair of spacers 22 are integrally formed and manufactured in the wiring sheet manufacturing step P2. 16b, and the solar battery cell 12 is housed in the assembled battery storage space 24 of the spacer 22; as shown in FIG. 11 and FIG. 12, the wiring piece in which the glass 18 is integrally formed in the wiring sheet manufacturing step P2 is integrated The material 16a is laminated on the surface 12a of the plurality of solar battery cells 12. In the laminating step P3, the pair of wiring sheets 16a and 16b and the pair of glasses 18 and 20 on which the metal electrodes 14 such as the bus bar electrodes 14a and the finger electrodes 14b are disposed are laminated on both sides 12a of the solar battery cells 12. And 12b, the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b is brought into contact with both faces 12a and 12b of the solar cell stack 12.

Next, as shown in FIG. 11 and FIG. 12, in the superimposing (thermo-compression bonding) step P4 of FIG. 5, the solar cell 12, the pair of wiring sheets 16a, 16b, and the glass 18 are laminated by the laminating step P3. The laminated body 36 of the 20 and the spacer 22 is pressed while being heated in a vacuum, for example, at a temperature ranging from 130 ° C to 150 ° C in a vacuum laminator, whereby the wiring sheets 16a and 16b are crimped to seal the plural Solar battery cells 12. And, in the stacking step P4 As shown in FIG. 12, a plurality of solar battery cells 12 are pressure-sealed by a vacuum laminating machine with a pair of wiring sheets 16a, 16b, and bus bar electrodes 14a and finger electrodes wired to the wiring sheets 16a, 16b. 14b can be fixed to the two sides 12a and 12b of the solar cell 12, and is fixed to a solar cell 12 in the adjacent solar cell 12 as shown in the dotted circle of FIG. The connection portion 14c of the bus bar electrode 14a of the back surface 12b and the connection portion 14c of the bus bar electrode 14a fixed to the surface 12a of the other solar cell 12 can be connected, that is, contacted. Thereby, the solar cell module 10 having a plurality of solar battery cells 12 in which five bus bar electrodes 14a are formed can be manufactured.

However, in the manufacturing method of the conventional solar battery module 10, in order to form, for example, the adjacent solar battery cells 12 are formed between the bus electrode 14a of the solar battery cell 12 and the other solar battery cell 12, for example. The bus bar electrodes 14b are connected in series, and the solder ribbon of the strip-shaped metal foil to be solder-coated is placed on the bus bar electrode 14a of the same width, and the solder ribbon is heated by the heating unit to be connected to the bus bar electrode 14a. However, if the solder ribbon is placed on the bus bar electrode 14a, the solder ribbon may protrude from the bus bar electrode 14a due to the positional deviation, and the portion of the solder ribbon protruding from the bus bar electrode 14a causes the light receiving area of the solar cell stack 12 to decrease. The conversion efficiency (%) of the solar battery cell 12, that is, the solar battery module 10 is lowered. Further, when a plurality of soldering strips are simultaneously placed on the plurality of bus bar electrodes 14a, the positional shift occurs, and the more the number of the bus bar electrodes 14a, the more the light receiving area of the solar cell stack 12 is reduced by the soldering strips. In other words, for example, when the solder ribbon is placed on the solar battery cell 12 in which the two bus bar electrodes 14a are formed, the width of the bus bar electrode 14a is produced. When the offset of 0.1 mm is generated, the total amount of the soldering tape is 0.2 mm. When the soldering tape is placed on the solar battery cell 12 in which the four bus bar electrodes 14a are formed, a bias of 0.1 mm is generated in the width direction of the bus bar electrode 14a. When the welding is performed, a total of 0.4 mm of protrusion is generated; therefore, the more the number of the bus electrodes 14a is, the more the light receiving area of the solar battery unit 12 is reduced by the welding bands. According to the manufacturing method of the solar cell module 10 of the present embodiment, the solar cell 12 is disposed on one of the wiring bus electrodes 14a on the wiring sheets 16a and 16b, and the solar cell 12 and the wiring are in the wiring. The contacts are formed between the bus bar electrodes 14a on the sheets 16a, 16b, so that it is not necessary to use the solder ribbon as in the case where the solar cell batteries 12 are connected in series with each other, and it is not necessary to mount the solder ribbon on the bus bar electrodes 14a. Thereby, the light-receiving area of the solar battery cell 12 is not reduced as is conventionally known, and the conversion efficiency (%) of the solar battery module 10 can be appropriately increased.

Here, the relationship between the number of bus bar electrodes 14a formed in the solar cell stack 12 and the conversion efficiency (%) of the solar cell 12 cells will be described with reference to FIGS. 13 to 18. 13 to 18, it is assumed that the number of bus bar electrodes 14a is changed to three, five, seven, fifteen, and twenty, and the width of the bus bar electrode 14a is changed to 1.4 mm, 0.8 mm, and 0.57 mm. In the case of 0.27 mm and 0.2 mm, the number of the finger electrodes 14b is changed to 70, 74, and 90, and the width of the finger electrodes 14b is changed to 100 μm, 80 μm, 60 μm, 40 μm, and 20 μm to produce 35. The solar cell battery 12 of the type and the measurement results of the conversion efficiency (%) of the 35 types of solar cell 12 are calculated by simulation.

However, in FIG. 13, three bus bars having a width of 1.4 mm are formed. The solar cell 12 of the electrodes 14 and 74 of the finger electrodes 14 having a width of 80 μm was used as the solar cell 12 of Comparative Example 1, to form three bus electrodes 14a having a width of 1.4 mm and 90 fingers having a width of 40 μm. The solar battery cell 12 of the electrode 14b is used as the solar battery cell 12 of the comparative example article 2, and the solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 90 finger electrodes 14b having a width of 40 μm is formed as an implementation. In the solar battery cell 12 of the article 1, the solar battery cell 12 in which seven bus bar electrodes 14a having a width of 0.57 mm and the finger electrodes 14b having a width of 40 μm are formed is used as the solar battery cell 12 of the article 2 of the embodiment. The solar battery cell 12 having 15 bus bar electrodes 14a having a width of 0.27 mm and 90 finger electrodes 14b having a width of 40 μm was formed as the solar cell battery 12 of the article 3 of the example to form 20 bus bars having a width of 0.2 mm. The electrode 14a and the solar cell 12 of 90 fingers 40b having a width of 40 μm are used as the solar cell 12 of the article 4 of the embodiment to form seven bus bar electrodes 14a having a width of 0.57 mm and 90 fingers of 20 m width and 20 μm. Solar cell battery 12 of electrode 14b as a real The article of Example 5 solar cell groups 12, 15 are formed to 0.27mm wide bus bar electrode 14a and the width 90 of 20μm finger electrode 14b of the solar cell 12 as the embodiment of the article of Example 5 the solar cell group 12.

Further, in Fig. 14, a solar battery cell 12 in which three bus bar electrodes 14a having a width of 1.4 mm and ten finger electrodes 14b having a width of 20 μm are formed is used as the solar battery cell 12 of Comparative Example 3 to form A solar cell 12 having three busbar electrodes 14a having a width of 1.4 mm and 74 finger electrodes 14b having a width of 20 μm was used as the solar cell stack 12 of Comparative Article 4 to form busbar electrodes 14a having a width of three 1.4 mm. And 90 finger electrodes with a width of 20 μm The solar battery cell 12 of 14b is used as the solar battery cell 12 of the comparative example article 5, and the solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and ten finger electrodes 14b having a width of 20 μm is formed as an embodiment. The solar battery cell 12 of the article 7 is formed of a solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 74 finger electrodes 14b having a width of 20 μm as the solar battery cell 12 of the article 8 of the embodiment. A solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 90 finger electrodes 14b having a width of 20 μm was formed as the battery cell 12 of the article 9 of the embodiment.

Further, in Fig. 15, a solar battery cell 12 in which three bus bar electrodes 14a having a width of 1.4 mm and ten finger electrodes 14b having a width of 40 μm are formed is used as the solar battery cell 12 of the comparative example article 6 to form The solar cell 12 having three bus bar electrodes 14a having a width of 1.4 mm and 74 finger electrodes 14b having a width of 40 m was used as the solar cell stack 12 of Comparative Article 7, to form five bus bar electrodes 14a having a width of 0.8 mm. And 70 solar cells 12 of the finger electrodes 14b having a width of 40 μm are used as the solar cell 12 of the article 10 of the embodiment to form five bus electrodes 14a having a width of 0.8 mm and 74 finger electrodes 14b having a width of 40 μm. The solar battery cell 12 serves as the solar battery cell 12 of the article 11 of the embodiment.

Further, in Fig. 16, a solar battery cell 12 in which three bus bar electrodes 14a having a width of 1.4 mm and ten finger electrodes 14b having a width of 60 μm are formed is used as the solar battery cell 12 of the comparative article 8 to form The solar cell 12 having three busbar electrodes 14a having a width of 1.4 mm and 74 finger electrodes 14b having a width of 60 μm was used as the solar cell stack 12 of Comparative Article 9 to form three busbar electrodes 14a having a width of 1.4 mm. And 90 finger electrodes with a width of 60 μm The solar battery cell 12 of 14b is used as the solar battery cell 12 of the comparative article 10, and the solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 70 finger electrodes 14b having a width of 60 μm is formed as an embodiment. The solar battery cell 12 of the article 12 is formed of a solar cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 74 finger electrodes 14b having a width of 60 μm as the solar cell battery 12 of the article 13 of the embodiment. A solar cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 90 finger electrodes 14b having a width of 60 m was formed as the solar cell stack 12 of the article 14 of the example.

Further, in Fig. 17, a solar battery cell 12 in which three bus bar electrodes 14a having a width of 1.4 mm and ten finger electrodes 14b having a width of 80 μm are formed is used as the solar battery cell 12 of the comparative article 11 to form The solar cell 12 having three busbar electrodes 14a having a width of 1.4 mm and 90 finger electrodes 14b having a width of 80 μm was used as the solar cell stack 12 of Comparative Article 12 to form five busbar electrodes 14a having a width of 0.8 mm. And 70 solar cells 12 of the finger electrodes 14b having a width of 80 μm are used as the solar cell 12 of the article 15 of the embodiment to form five bus electrodes 14a having a width of 0.8 mm and 74 finger electrodes 14b having a width of 80 μm. The solar battery cell 12 is the solar battery cell 12 of the article 16 of the embodiment, and the solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 90 finger electrodes 14b having a width of 80 μm is formed as an embodiment article. 17 solar battery pack battery 12.

Further, in Fig. 18, a solar battery cell 12 in which three bus bar electrodes 14a having a width of 1.4 mm and ten finger electrodes 14b having a width of 100 μm are formed is used as the solar battery cell 12 of the comparative article article 13 to form There are three bus electrodes 14a with a width of 1.4mm and 74 finger electrodes 14b with a width of 100μm. The solar battery cell 12 was used as the solar battery cell 12 of the comparative example article 14 as a comparative example article 15 in which three bus bar electrodes 14a having a width of 1.4 mm and a finger electrode 14b having a width of 100 μm of 100 μm were formed. The solar battery cell 12 is formed of a solar battery cell 12 having five bus bar electrodes 14a having a width of 0.8 mm and 70 finger electrodes 14b having a width of 100 μm as the solar battery cells 12 of the article 18 of the embodiment. 5 solar cell electrodes 14a having a width of 0.8 mm and 74 solar cells 12 having a finger electrode 14b having a width of 100 μm are used as the solar cell 12 of the article 19 of the embodiment to form five bus electrodes 14a having a width of 0.8 mm and A solar battery cell 12 of 90 finger electrodes 14b having a width of 100 μm is used as the solar battery cell 12 of the article 20 of the embodiment.

Moreover, Eff (conversion efficiency) (%) of FIG. 13 to FIG. 18 is calculated by the following formula (1). Further, in the formula (1), Voc (open voltage) (V) is calculated by the following formula (2), and Jsc (short-circuit current density) (mA/cm ² ) is calculated by the following formula (3), and FF (fill factor) ) is calculated by the following formula (4). Further, in the formula (2), Jo (total) is calculated by the following formula (5), and in the formula (4), FFO is calculated by the following formula (6), and Rch is calculated by the following formula (7). However, in the following formulas (1) to (7), the ideal factor of the n-type diode, the k-system Boltzmann constant, the T-system temperature (Kjeldahl temperature), the q-system element charge, and the Fgl system are in the form of fingers. The electrode 14b covers the ratio of the light receiving surface of the solar cell 12, and Rs is a series resistor, and Jometal, Joemtter, JoBSF, and JoBulk are predetermined constants.

Eff (conversion efficiency) = Voc (open voltage) × Jsc (short circuit current density) × FF (fill factor) (1)

Voc (open voltage) = n × k × T / q × In (Jsc / Jo (total) - 1)... (2)

Jsc (short circuit current density) = 38 × (1-Fgl)... (3)

FF (fill factor) = FFo × (l-Rs/Rch)... (4)

Jo(total)=Fgl×Jometal+(1-Fgl)×Joemitter+JoBSF+JoBulk...(5)

FFo=(q×Voc/n×k×T−In(q×Voc/n×k×T+0.72))/(q×Voc/n×k×T+l) (6)

Rch=Voc/Jsc...(7)

According to the measurement results of FIG. 13, the solar battery cells 12 of the comparative articles 1 and 2 were compared with the solar battery cells 12 of the articles 1 to 6, and the Eff (conversion efficiency) (%) was based on the articles 1 to 6 of the examples. The solar battery cell 12 is higher. Further, according to the measurement results of Figs. 14 to 18, in the solar battery cells 12 of the comparative articles 1 to 15, and the article 1 and the articles 7 to 20 of the embodiment, the widths of the finger electrodes 14b and the number of the fingers thereof are the same. In the solar battery cell 12, Eff (conversion efficiency) (%) can be improved by changing the bus bar electrode 14a from three to five. Therefore, by making the number of the bus bar electrodes 14a five or more, Eff (conversion efficiency) (%) can be improved more than, for example, a conventional solar cell battery in which three bus bar electrodes are formed. Further, according to the measurement results of Fig. 13, the FF (fill factor) is also higher in the solar battery cells 12 of the articles 1 to 6 of the embodiment, and the output of the solar battery cells 12 is higher. Therefore, by making the number of bus bar electrodes 14a five or more, it is possible to increase the output more than a conventional solar cell battery in which, for example, three bus bar electrodes 14a are formed. Further, in the solar battery cell 12 of the comparative example article 2, the article 1 to the article 4 of the embodiment, the Eff (conversion efficiency) (%) increases as the number of the bus bar electrodes 14a increases.

Further, according to the measurement result of FIG. 14, the increase range of the Eff (conversion efficiency) (%) when the bus bar electrode 14a is changed from three to five is 0.53 to 0.68 (%); according to the measurement result of FIG. 15, the bus bar is used. When the electrode 14a is changed from three to five, the Eff (conversion efficiency) (%) is increased by 0.27 to 0.34 (%). According to the measurement result of FIG. 16, the bus electrode 14a is changed from three to five. The increase range of Eff (conversion efficiency) (%) is 0.18 to 0.23 (%). According to the measurement result of Fig. 17, the increase in Eff (conversion efficiency) (%) when the bus bar electrode 14a is changed from three to five 0.13 to 0.17 (%); according to the measurement result of FIG. 18, the Eff (conversion efficiency) (%) when the bus bar electrode 14a is changed from three to five is increased by 0.11 to 0.13 (%); It is considered that the increase rate (%) of the conversion efficiency when the bus bar electrode 14a is changed from three to five is increased as the width of the finger electrode 14b is narrowed. Further, in the solar battery cell 12 of the present embodiment, it is considered that the width of the finger electrode 14b is set to 80 μm or less (preferably 60 μm or less) and the strip of the bus bar electrode 14a is determined from the measurement results of FIGS. 14 to 18. The number is changed from 3 to 5, and it is expected to increase Eff (conversion efficiency) (%).

As shown in the measurement results of FIGS. 13 to 18, by making the bus bar electrodes 14a five or more, the solar cell stack 12 can be further reinforced by the conventional solar cell stack 12 having three bus bar electrodes 14a. The output is, for example, a solar battery module 10 having a plurality of conventional solar battery cells 12 in which three bus bar electrodes 14a are formed, and a sun having a plurality of solar battery cells 12 in which five or more bus bar electrodes 14a are formed. In contrast to the battery module 10, the difference between the individual outputs of the two solar cell modules 10 becomes larger. That is, in the solar cell module 10, the solar cell batteries 12 are connected in series to each other and recovered from The connection resistance component of the bus bar electrode 14a or the like from which the plurality of solar battery cells 12 are taken out causes power loss, and the amount of Joule heat generated by the connection resistance component which is a cause of the power loss is the square product of the resistance and the current. proportion. Therefore, for example, by reducing the current flowing to one bus electrode 14a by 1/2, even if the resistance is the same, the loss (Joule heat) is only 1/4, so that the flow is increased by increasing the number of bus electrodes 14a. The current to the bus bar electrode 14a is reduced, and the loss due to the connection resistance component of the bus bar electrode 14a or the like can be appropriately reduced. Therefore, for example, the output of the solar cell module 10 having the battery of the plurality of embodiments of the articles 1 to 6 can be appropriately made. Upgrade.

According to the solar battery module 10 of the present embodiment, the solar battery cells 12 are disposed on the wiring sheets 16a and 16b on which the bus bar electrodes 14a are disposed, so that the solar battery cells 12 and the wirings are on the wiring sheets 16a and 16b. A contact is formed between the bus bar electrodes 14a, and the bus bar electrode 14a functions as a mark line, and the number of the mark lines wired on the surface 12a of the solar cell 12 is five or more. Therefore, the solar cell 12 is placed on the wiring sheets 16a and 16b on which the bus bar electrodes 14a are disposed, and the solar cell stack 12 and the bus bar electrodes 14a on the wiring sheets 16a and 16b are formed to form contacts. Therefore, it is not necessary to use a solder ribbon as in the case of connecting the solar battery cells in series with each other, and it is not necessary to use a heating device that heats the solder ribbon. Thereby, the number of the marking lines formed in the solar battery cell 12 is not limited by the number of the above-described heating means, so that the solar battery module 10 having the plurality of solar battery cells 12 formed with five marking lines can be manufactured. .

Further, according to the solar battery module 10 of the present embodiment, one of the bus bar electrodes 14a is wired to the wiring sheets 16a and 16b and the pair of glasses 18 and 20 The two sides 12a, 12b of the solar cell 12 are laminated so that the bus electrodes are in contact with both sides 12a, 12b of the solar cell 12, and are heated while being pressed, whereby the contact between the solar cell 12 and the bus electrode 14a can be obtained. In the dot state, a spacer 22 composed of an insulating composition is disposed between the pair of wiring sheets 16a and 16b. Therefore, when the laminated body 36 composed of the solar battery cell 12, the pair of wiring sheets 16a and 16b, and the pair of glasses 18 and 20 is heated while being pressed, it can be added to the sun by the spacer 22 The load of the battery cells 12 prevents the solar battery cells 12 from being broken.

Further, according to the solar battery module 10 of the present embodiment, the metal electrodes 14 wired on the wiring sheets 16a and 16b function as the bus bar electrodes 14a and the finger electrodes 14b, so that the electric resistance of the solar battery cells 12 can be appropriately reduced.

Further, according to the solar battery module 10 of the present embodiment, the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b of the wiring sheets 16a and 16b is a metal wire or a metal foil or a thermosetting conductive composition. Or a low melting point alloy, so that the metal electrode 14 can be appropriately wired on the wiring sheets 16a and 16b.

Further, according to the solar battery module 10 of the present embodiment, the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b composed of the metal wire or the metal foil is transmitted through a thermosetting transparent adhesive or containing conductive fine particles. The heat-curable transparent adhesive is fixed to the wiring sheets 16a and 16b. Therefore, the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b composed of the metal wire or the metal foil can be appropriately wired on the wiring sheet 16a. On 16b.

Further, according to the solar battery module 10 of the present embodiment, the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b composed of the thermosetting conductive composition can be composed of metal particles and a binder resin by printing. The composition is formed by drying and drying, and the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b composed of the thermosetting conductive composition can be appropriately wired on the wiring sheets 16a and 16b.

Further, according to the solar battery module 10 of the present embodiment, the bus bar electrode 14a having the function of the mark line has a line width of 0.8 mm or less and an aspect ratio of 1/7 or more. Therefore, the shadow area of the bus bar electrode 14a on the solar cell 12 can be appropriately reduced, and the electric resistance of the solar cell 12 can be appropriately reduced.

Further, according to the solar battery module 10 of the present embodiment, the number of finger electrodes 14b having a finger function is 70 or more, the line width is 80 μm or less, and the aspect ratio is 1/7 or more. Therefore, the shaded area of the finger electrode 14b on the solar cell 12 can be appropriately reduced, and the electric resistance of the solar cell 12 can be appropriately reduced, and the conversion efficiency can be appropriately improved.

Further, according to the solar battery module 10 of the present embodiment, the wiring sheets 16a and 16b are made of a sealing material, which is PVB or EVA, so that the durability of the solar battery module 10 can be appropriately improved.

Moreover, according to the manufacturing method of the solar cell module 10 of the embodiment, the solar cell module 10 is manufactured by the laminating step P4, that is, the vacuum laminating machine is formed by pressing and heating at the time of lamination. The solar cell 12, the pair of wiring sheets 16a and 16b, and the laminated body 36 of the pair of glasses 18 and 20 are heated and pressure-bonded. Therefore, there is no need for a solder ribbon in which the solar cell batteries are connected in series with each other as a conventional step, and it is not necessary to use the same. The heating device for heating the ribbon is such that the number of bus bar electrodes 14a formed in the solar cell 12 is not limited by the number of the heating devices, and a plurality of solar cells 12 having five bus electrodes 14a can be fabricated. Solar battery module 10.

Example 2

Next, other embodiments of the present invention will be described. In the following description, the parts that are common to the embodiments are denoted by the same reference numerals, and the description thereof will be omitted.

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in that it has a different bus bar electrode 14a' having a different cross-sectional shape of the bus bar electrode 14a, and the other is the solar cell of the first embodiment. Module 10 is identical.

As shown in Fig. 19, the bus bar electrode 14a' has a circular cross section. Therefore, if the light received by the solar cell module is reflected by the bus bar electrode 14a', a part of the reflected light is reflected to the glass 18 and then incident on the solar cell stack 12, so that a bus bar electrode having a rectangular cross-sectional shape is used. The solar cell module 10 of Embodiment 1 of the present invention can more effectively utilize the light received by the solar cell module. Further, the bus bar electrode 14a' is formed of a metal wire having a circular cross section by rolling, die stretching, or the like.

Example 3

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in that the bus bar electrode 14a having a different cross-sectional shape of the bus bar electrode 14a differs, and the other is the solar cell of the first embodiment. Module 10 is identical.

As shown in Fig. 20, the bus bar electrode 14a" has a triangular cross section. Therefore, if the bus electrode 14a" reflects the light received by the solar cell module, a part of the reflected light is reflected to the glass 18 and then incident on the solar cell 12, so that a bus electrode having a rectangular cross-sectional shape is used. The solar cell module 10 of the first embodiment can utilize the light received by the solar cell module more effectively than the solar cell module 10 of the first embodiment. The bus bar electrode 14a is formed by a rolling process or a die drawing process. A metal wire of a triangle is formed.

Example 4

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in that the bus bar electrodes 14a'' having different cross-sectional shapes of the bus bar electrodes 14a are different, and the other is the same as that of the first embodiment. The solar cell module 10 is the same.

As shown in Fig. 21, the bus bar electrode 14a''' has a quadrangular cross section, and the surface on the light-receiving surface side is surface-treated into irregularities. Therefore, if the light received by the solar cell module is reflected by the surface of the bus bar electrode 14a", a part of the reflected light is reflected to the glass 18 and then incident on the solar cell 12, so that the cross-sectional shape is rectangular. The bus electrode 14 of the embodiment 1 can utilize the light received by the solar cell module more effectively than the solar cell module 10 of the first embodiment. The bus bar electrode 14a" is a pair of metal wires processed to have a metal cross-sectional shape at four corners. The surface is formed by sandblasting or the like. Further, in place of the above-described sandblasting, a surface of the above-mentioned metal wire may be attached with a sand brush, sandpaper or the like.

Example 5

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in the following two points, and the other is the same as the first embodiment. The solar battery module 10 is slightly identical: it is a single-sided light-receiving solar battery unit, that is, the solar battery unit 12 is composed of, for example, an n-type p and a p-type ,, and is received by the surface 12a of the solar battery unit 12. On the other hand, the wiring sheet 16b is one end of the wiring sheet 40 of the finger electrode 14b, and the wiring sheet 16b is disposed on the side opposite to the light receiving surface 12a side of the solar battery cell 12.

As shown in Fig. 22, five bus bar electrodes 42 are respectively wired at six places on a wiring sheet (transparent sheet) 40 composed of a long flat plate and formed of EVA, and the five bus bar electrodes 42 are respectively formed with respect to the five bus bar electrodes 42. The connection portion 42a extending in the longitudinal direction of the wiring sheet 40 is integrated, and the bus bar electrode 42 is a metal electrode that extends in the longitudinal direction of the wiring sheet 40 and has a function of a mark line. On the other hand, since the width of the bus bar electrode 42 is wider than the width of the bus bar electrode 14a of the first embodiment, the electric resistance of the solar cell stack 12 can be appropriately reduced even if the finger electrode is not wired on the wiring sheet 40. Further, the bus bar electrode 42 of the wiring sheet 40 and the wiring of the first embodiment are made of a metal wire, a metal foil, or a heat, similarly to the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b of the wiring sheet 16b. A hardened conductive composition or a low melting point alloy is formed.

As shown in Fig. 22, a pair of spacers 22 are fixed to the wiring sheet 40, and a back sheet (not shown) is provided on the opposite side of the side of the wiring sheet 40 on which the spacers 22 are provided. When the solar battery cell 12 is housed in the battery storage space 24 of the spacer 22 on the wiring sheet 40, the bus bar electrode 42 of the wiring sheet 40 is in contact with the light receiving surface 12a side of the solar battery cell 12. The opposite side of the face 12b.

In the solar cell module of the embodiment, the embodiment 1 is too In the laminating step P3, the wiring sheet 40 in which the bus bar electrodes 42 are wired and the bus bar electrodes 14a are wired on the both surfaces 12a and 12b of the single-sided light-receiving solar cell 12 in the laminating step P3. The wiring sheet 16a of the metal electrode 14 such as the finger electrode 14b is placed on the surface 12a of the single-sided light-receiving solar cell 12, that is, the light-receiving side laminated glass 18, and the back surface 12b side of the solar battery cell 12 is The side back sheet is opposite to the light receiving surface side, and the bus bar electrode 14a and the finger electrode 14b are brought into contact with the surface 12a of the solar cell 12, and the bus bar electrode 42 is brought into contact with the back surface 12b of the solar cell 12 . Then, in the lamination step P4, the laminate body which is laminated by the lamination step P3 is heated while being pressed by a vacuum laminator, whereby the solar cell battery is formed by the wiring sheet 16a and the wiring sheet 40. The pressure-sealing seal is such that the connecting portion 14c of the bus bar electrode 14a and the connecting portion 42a of the bus bar electrode 42 can be connected to each other in the adjacent solar battery cell 12. On the other hand, the spacer 22 is disposed between the wiring sheet 40 and the wiring sheet 16a in the laminated body laminated by the laminating step P3.

According to the solar cell module of the present embodiment, the bus bar electrode 42 or one of the bus bar electrode 14a and the finger electrode 14b is laminated on the both sides 12a and 12b of the solar cell stack 12, and is on one side of the wiring sheet 16a, 40. The light-receiving surface side laminated glass 18 on the surface 12a side of the light-receiving solar battery cell 12 is laminated on the back surface 12b side of the single-sided light-receiving solar battery cell 12, that is, on the side opposite to the light-receiving surface side, and the bus bar electrode 42 is laminated. The bus bar electrode 14a and the finger electrode 14b are in contact with both faces 12a and 12b of the solar cell stack 12, and are heated while being pressed in the laminating step P4, whereby the solar cell 12 and the bus bar electrode 42 and the bus bar can be obtained. Electrode 14a and finger electrode In the contact state of 14b, a pair of spacers 22 composed of an insulating composition are disposed between the pair of wiring sheets 16a and 40. Therefore, when the laminated body composed of the solar battery cell 12, the pair of wiring sheets 16a and 40, the glass 18, and the back sheet is heated while being pressed, it can be reduced by a pair of spacers 22 The load on the solar battery cell 12 prevents the solar battery cell 12 from being broken.

Example 6

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in the following two points, and the other is slightly the same as the solar cell module 10 of the first embodiment: it is disposed in the solar cell module. The wiring sheet 16a on the surface 12a side of the battery 12 is a wiring sheet 46 having no finger electrodes and having the bus bar electrodes 44 of the ten metal electrodes, and a wiring sheet disposed on the back surface 12b side of the solar battery cell 12. The material 16b is a wiring sheet 50 which does not have a finger electrode and is wired with the bus electrode 48 of ten metal electrodes.

As shown in FIG. 23, in the wiring sheet (transparent sheet) 46 composed of a long strip and formed of EVA, six wirings are respectively extended in the longitudinal direction of the wiring sheet 46 and have a mark line function. The bus bar electrodes 44 are integrally formed with the connection portions 44a extending in the vertical direction with respect to the longitudinal direction of the wiring sheet 46, respectively, in the ten bus bar electrodes 44.

As shown in FIG. 24, in the wiring sheet (transparent sheet) 50 composed of an EVA, the wiring is extended in the longitudinal direction of the wiring sheet 50 and has a mark line function. The bus bar electrodes 48 are integrally formed with the connection portions 48a extending in the vertical direction with respect to the longitudinal direction of the wiring sheet 50, respectively, in the ten bus bar electrodes 48. And, the wiring is in a pair of wiring The bus bar electrodes 44 and 48 of the sheets 46 and 50 and the wiring of the first embodiment are made of a metal wire or a metal foil in the same manner as the metal electrode 14 such as the bus bar electrode 14a and the finger electrode 14b of the pair of wiring sheets 16a and 16b. Or a thermosetting conductive composition or a low melting point alloy.

As shown in FIG. 24, a pair of spacers 22 are fixed to the wiring sheet 50, and when the solar battery cells 12 are housed in the battery storage space 24 of the spacers 22 on the wiring sheet 50, the bus bar electrodes of the wiring sheets 50 are provided. 48 contacts the back side 12b of the solar cell battery 12. Moreover, the glass 18 is fixed to the wiring sheet 46, and the glass 20 is fixed to the wiring sheet 50.

In the solar cell module of the present embodiment, in the laminating step P3, the solar cell module 10 of the first embodiment is connected to the busbars 12a and 12b of the solar cell stack 12 in the laminating step P3. The wiring sheet 46 of the electrode 44 and the wiring sheet 50 on which the bus bar electrode 48 is wired and the pair of glasses 18 and 20, and the bus bar electrodes 44 and 48 laminated to the wiring sheets 46 and 50 are in contact with both sides 12a of the solar battery cell 12. And 12b. Then, in the laminating step P4, the layered body laminated by the laminating step P3 is heated while being pressed by a vacuum laminator, for example, thereby heating the solar cell 12 with the wiring sheet 46 and the wiring sheet 50. The pressure-sealing seal is such that the connecting portion 44a of the bus bar electrode 44 and the connecting portion 48a of the bus bar electrode 48 can be connected to the adjacent solar battery cell 12. Therefore, according to the solar battery module of the present embodiment, a solar battery module having a plurality of solar battery cells 12 formed with ten bus electrodes 44, 48 can be manufactured.

Example 7

The solar cell module of the present embodiment and the sun of the foregoing embodiment 1 The battery module 10 is different from the following three points, and the other is slightly the same as the solar battery module 10 of the first embodiment: the two sides 12a, 12b of the solar battery unit 12 are pre-connected with a finger electrode 52; The wiring sheet 16a on the surface 12a side of the solar cell 12 is a point of the wiring sheet 54 on which the finger electrodes are not wired, and the wiring sheet 16b disposed on the back surface 12b side of the solar cell 12 is an unwiring finger The wiring sheet 40 of the above-described Embodiment 5 of the electrode is a little.

As shown in FIG. 25, five bus bar electrodes 56 are respectively wired at six places on a wiring sheet (transparent sheet) 54 composed of an EVA, and five bus bar electrodes 56 are formed with respect to the wiring. The connecting portion 56a extending in the longitudinal direction of the sheet 54 is integrated, and the bus bar electrode 56 is a metal electrode extending in the longitudinal direction of the wiring sheet 54 and having a function of a marking line.

As shown in Fig. 26, a plurality of, for example, 90 finger electrodes 52 are previously connected to both sides 12a, 12b of the solar battery cell 12. Further, in Fig. 26, in order to facilitate the understanding of the present embodiment, the number and size of the finger electrodes 52 connected to the solar battery cells 12 are illustrated in a manner different from the actual articles.

Hereinafter, the method of manufacturing the solar cell module of the present embodiment will be described. As shown in Fig. 26, first, in the solar battery cell forming step P5 of Fig. 27, the solar battery cell 12 is formed in the same manner as the solar battery cell forming step P1.

Next, in the solar cell battery surface finger electrode forming step P6 of FIG. 27, a finger electrode 52 composed of, for example, silver or the like is formed on the surface 12a of the solar cell stack 12, and thereafter the finger electrode 52 is formed. Drying The finger electrode 52 is hardened, whereby the finger electrode 52 is formed on the surface 12a of the solar cell 12 as shown in FIG.

Next, in the solar cell battery back finger electrode forming step P7 of Fig. 27, a finger electrode 52 made of, for example, silver or the like is formed on the back surface 12b of the solar cell 12, and thereafter the finger electrode 52 is formed. Drying causes the finger electrode 52 to harden, whereby the finger electrode 52 is formed on the back surface 12b of the solar cell 12 .

Next, in the wiring sheet manufacturing step P8 of Fig. 27, a resin sheet wiring bus bar electrode 56 composed of an EVA is formed as shown in Fig. 25 to manufacture a wiring sheet 54, and is shown in Fig. 22 The resin sheet wiring bus bar electrode 42 made of a flat plate and made of EVA is used to manufacture the wiring sheet 40. Further, similarly to the wiring sheet manufacturing step P2, the bus bar electrodes 42 and 56 wired on the wiring sheets 40 and 54 are formed of a metal wire, a metal foil, a thermosetting conductive composition, or a low melting point alloy. . 27, in the solar cell battery back finger electrode forming step P7, the wiring sheet manufacturing step P8 is performed, for example, the wiring sheet manufacturing step P8 can be performed in the solar cell forming step P5 to the solar battery cell. The step of forming the back finger electrode in step P7 may be performed before the solar cell battery forming step P5. Further, the solar cell battery surface finger electrode forming step P6 may be followed by the solar cell battery back finger electrode forming step P7.

In the wiring sheet manufacturing step P8, a pair of spacers 22 are produced in the same manner as the wiring sheet manufacturing step P2, and the pair of spacers 22 are fixed to the wiring sheet 40 by, for example, an adhesive. Also, in the manufacture of wiring sheets In the step P8, similarly to the wiring sheet manufacturing step P2, the long flat transparent glass 18, 20 is fixed to the wiring sheets 40, 54 by, for example, an adhesive.

Next, in the laminating step P9 of FIG. 27, the wiring sheet 40 in which the glass 20 and the pair of spacers 22 are fixed in the wiring sheet manufacturing step P8 is laminated with the solar battery cell 12 to make the solar battery pack The battery 12 is housed in the assembled battery storage space 24 of the spacer 22, and the wiring sheet 54 in which the glass 18 is fixed and manufactured by the wiring sheet manufacturing step P8 is laminated on the surface 12a of the solar battery cell 12. In other words, in the lamination step P9, the both surfaces 12a and 12b of the solar cell 12 to which the finger electrodes 52 are connected in advance are connected, and one of the bus electrodes 42 and 56 is wired to the wiring sheets 40 and 54 and the pair of glasses 18 The 20-layered bus bar electrodes 42, 56 are in contact with both sides 12a and 12b of the solar battery cell 12. In addition, the dotted line in FIG. 26 indicates the position of the bus bar electrode 56 when the wiring sheet 54 has been laminated on the surface 12a of the solar cell 12 to which the finger electrode 52 is connected.

Next, in the superimposing (thermocompression bonding) step P10 of FIG. 27, heating is performed in a vacuum, for example, at a temperature ranging from 130 ° C to 150 ° C, for example, in a vacuum laminator, in the same manner as in the laminating step P4. The materials 40, 54 crimp and seal a plurality of solar battery cells 12, so that the connecting portion 42a of the adjacent bus battery 12 fixed to the rear surface 12b of the solar battery cell 12 can be connected to the connecting portion 42a of the solar battery cell 12 The connecting portion 56a of the bus bar electrode 56 fixed to the surface 12a of the other solar battery cell 12 is connected. Thereby, a solar cell module having a plurality of solar battery cells 12 formed with five bus bar electrodes 42, 56 can be manufactured.

Example 8

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in the following four points, and the others are slightly the same as the solar cell module 10 of the first embodiment: the solar cell battery 12 thereof. A single-sided light-receiving solar cell 60 having an anti-reflection film 58 and a metal electrode 59 and composed of, for example, an n-type semiconductor 60a and a p-type semiconductor 60b; a surface 60c of the solar cell 60 is previously connected with a bus electrode 62 and the finger electrode 64, and the bus bar electrode 66 is connected in advance to the back surface 60d of the solar cell 60; the wiring sheet 16a disposed on the surface 60c side of the solar cell 60 is the above-mentioned unwired finger electrode. One point of the wiring sheet 54 of the seventh embodiment; and a wiring sheet 16b disposed on the back surface 60d side of the solar battery cell 60 is a point of the wiring sheet 40 of the above-described fifth embodiment in which the finger electrodes are not wired.

As shown in Fig. 28, five bus bar electrodes 62 and a plurality of, for example, 90 finger electrodes 64 are connected in advance to the surface 60c of the solar cell battery 60. Further, as shown in FIG. 28, five bus bar electrodes 66 are connected in advance to the back surface 60d of the solar battery cell 60. Further, the intervals of the five bus bar electrodes 62, 66 and the wiring are the same in the respective intervals of the bus bar electrodes 42, 56 of the wiring sheets 40, 54. Further, in Fig. 28, in order to facilitate the understanding of the present embodiment, the number and size of the finger electrodes 64 connected to the solar battery cells 60 are illustrated in a manner different from the actual articles.

Hereinafter, the method of manufacturing the solar cell module of the present embodiment will be described. First, in the solar cell formation step P11 of FIG. 29, as shown in FIG. 28, the n-type semiconductor 60a is laminated on the p-type semiconductor 60b to form a solar cell 60, and thereafter to the solar cell 60. The surface 60c is laminated with the anti-reflection film 58 in one body.

Next, in the solar cell battery back bus electrode printing step P12 of FIG. 29, a bus electrode 66 made of, for example, silver or the like is formed on the back surface 60d of the solar cell battery 60. Next, the bus bar electrode 66 formed on the back surface 60d of the solar battery cell 60 is dried in the first drying step P13 of FIG.

Next, in the solar cell rear surface metal electrode printing step P14 of Fig. 29, a flat metal electrode 59 made of, for example, aluminum or the like is formed on the back surface 60d of the solar battery cell 60. Next, in the second drying step P15 of Fig. 29, the metal electrode 59 printed on the back surface 60d of the solar battery cell 60 is dried.

Further, in the solar cell battery surface finger-like and bus-bar electrode simultaneous printing step P16 of FIG. 29, the bus bar electrode 62 and the finger electrode 64 composed of, for example, silver or the like are formed by simultaneously printing on the anti-reflection film 58. The anti-reflection film 58 is formed on the surface 60c of the solar cell battery 60. Next, in the third drying step P17 of FIG. 29, the bus bar electrode 62 and the finger electrode 64 formed on the anti-reflection film 58 of the solar cell 60 are dried.

Further, in the fire through step P18 of FIG. 29, the solar cell battery 60 is fired in the range of 750 ° C to 800 ° C, whereby the anti-reflection film 58 formed on the solar cell 60 is formed. The upper bus bar electrode 62 and the anti-reflection film 58 under the finger electrode 64 are etched, and the bus bar electrode 62 and the finger electrode 64 are connected to the surface 60c of the solar cell battery 60 as shown in FIG.

Next, in the wiring sheet manufacturing step P19 of Fig. 29, and wiring In the sheet manufacturing step P8, the wiring sheet 40 on which the bus bar electrode 42 is wired and the wiring sheet 54 on which the bus bar electrode 56 is wired are manufactured in the same manner. In the wiring sheet manufacturing step P19, similarly to the wiring sheet manufacturing step P8, for example, a pair of spacers 22 and a back sheet (not shown) are fixed to the wiring sheet 40 by an adhesive, and for example, The agent fixes the glass 18 to the wiring sheet 54 in one piece. In FIG. 29, the wiring sheet manufacturing step P19 is performed after the firing step P18, and the wiring sheet manufacturing step P19 can be performed, for example, after any of the steps of the solar cell formation step P11 to the firing step P18. This can be performed before the solar cell battery forming step P11. Moreover, the solar cell surface finger shape, the bus bar electrode simultaneous printing step P16, and the third drying step P17 may be performed before the solar cell battery back metal electrode printing step P12 to the second drying step P15.

Next, in the laminating step P20 of FIG. 29, the solar cell battery 60 is laminated on the wiring sheet 40 in which the spacer 22 and the back sheet are integrally formed in the wiring sheet manufacturing step P19. The battery cell 60 is housed in the assembled battery storage space 24 of the spacer 22, and the wiring sheet 54 in which the glass 18 manufactured in the wiring sheet manufacturing step P19 is integrated is laminated on the surface of the solar battery cell 60. 60c side. In other words, in the laminating step P20, the bus bar electrodes 62 and the finger electrodes 64 are connected to the surface 60c side, and the both surfaces 60c and 60d of the solar cell stack 60 of the metal electrode 59 and the bus bar electrode 66 are connected to the back surface 60d side. The laminated wiring has one of the bus bar electrodes 42, 56 facing the wiring sheets 40 and 54, and the laminated glass 18 is laminated on the surface 60c side, and the back sheet is laminated on the back surface 60d side so that the bus bar electrode 56 of the wiring sheet 54 is in contact with the formation. On the surface of the solar cell battery 60 The bus bar electrode 62 of 60c contacts the bus bar electrode 42 of the wiring sheet 40 to the metal electrode 59 formed on the back surface 60d of the solar cell battery 60. In addition, the dotted line in FIG. 28 indicates the position of the bus bar electrode 56 when the wiring sheet 54 has been laminated on the surface 60c of the solar cell 60 to which the bus bar electrode 62 and the finger electrode 64 are connected.

Next, in the lamination (thermo-compression bonding) step P21 of FIG. 29, as in the lamination step P4, for example, a vacuum laminator is used in a vacuum, for example, in the range of 130 ° C to 150 ° C, whereby the wiring piece is used. The materials 40, 54 crimp and seal a plurality of solar battery cells 60, so that the connecting portion 42a of the bus bar electrode 42 fixed to the back surface 60d of the solar battery cell 60 in the adjacent solar battery cell 60 can be fixed. It is connected to the connection portion 56a of the bus bar electrode 56 fixed to the surface 60c of the other solar battery cell 60. Thereby, a solar cell module having a plurality of solar battery cells 60 in which five bus bar electrodes 42, 56 are formed can be manufactured.

Example 9

The solar cell module of the present embodiment is different from the solar cell module 10 of the first embodiment in that one of the wiring sheets 16b is different from the spacers 22 by the spacers 68, and the other is the same as the first embodiment. The solar cell module 10 is slightly identical.

As shown in FIG. 30, the spacer 68 is formed of an insulating composition such as ceramic or a mixture of ceramic and resin, and is formed into a long flat plate shape, and a battery storage space for accommodating the solar battery cell 12 is formed in the spacer 68. 70, and an insertion space 72 into which the wiring is inserted into the connection portion 14c of the bus bar electrode 14a of the wiring sheets 16a and 16b. Moreover, the width E of the assembled battery storage space 70 It is the same as the size A of the solar battery cell 12, or only slightly larger than the size A of the solar battery cell 12. Moreover, the thickness of the spacer 60 is the same as or thicker than the thickness of the solar cell 12 .

Further, the spacer 68 is disposed so as to be embedded between the plurality of solar battery cells 12 with respect to the light receiving surface of the solar battery module, and the color of the spacer 68 is, for example, white which is more easily reflected by light. Therefore, light reflected by the solar cell module to be reflected to the spacer 68 is reflected to the glass 18, 20 and then incident on the solar cell 12 .

According to the solar cell module of the present embodiment, the pair of wiring sheets 16a, 16b are provided with transparent glass 18, 20 or a transparent resin. Therefore, for example, a part of the light received by the spacer 68 in the light received by the solar cell module can be reflected to the transparent glass 18, 20 or the resin, and then incident on the solar cell 12 .

The embodiments of the present invention are described in detail above with reference to the drawings, but the invention may be applied to other aspects.

In the solar cell module 10 of the present embodiment, the solar cell battery 12 is a hybrid battery (HIT type) solar cell battery in which a wafer and an amorphous crucible are laminated, for example, the solar cell 12 can be a twin system. A solar battery cell, a heterojunction solar cell battery, and a compound such as CIGS are solar battery cells. Therefore, by applying the present invention, it is possible to appropriately wire five or more bus electrodes in a solar cell such as a twin crystal solar cell, a heterojunction solar cell, or a compound solar cell such as CIGS. 14a.

Moreover, in the solar cell modules of Embodiments 1 to 4, 6, 7, and 9, The solar cell battery uses a double-sided light-receiving solar cell battery, and a single-sided light-receiving solar cell battery can also be used. Further, in the solar battery modules of the fifth and eighth embodiments, the solar battery cell uses a single-sided light-receiving solar battery, and a double-sided light-receiving solar battery can also be used.

Further, in the solar battery module of the ninth embodiment, the color of the spacer 68 is white which is more easily reflected by light, but the color of the spacer 68 may be any color. For example, when the color of the spacer 68 is a black color such as a building, the aesthetics of the solar cell module 10 in the construction can be appropriately improved.

In the solar battery module 10 of the first embodiment, the number of the bus bar electrodes 14a formed in the solar battery cells 12 is five and the line width thereof is 0.8 mm. For example, the number of the bus bar electrodes 14a can be increased by more than five. Its line width is finer than 0.8mm. Further, the number of finger electrodes 14b formed in the solar cell 12 is 90 and the line width thereof is 40 μm. For example, the number of the finger electrodes 14b may be increased by more than 90, and the line width may be made thinner than 40 μm.

Further, in the solar battery module 10 of the first embodiment, the spacer 22 is formed in a ring shape by surrounding the solar battery cell 12 with the vertical frame portion 22a and the horizontal frame portion 22b, and the spacer 22 may be acyclic. For example, only the vertical frame portion 22a may be fixed to the wiring sheets 16a and 16b, or only the horizontal frame portion 22b may be fixed to the wiring sheets 16a and 16b. That is, the spacer 22 may have any shape as long as the load applied to the solar battery cell 12 can be reduced in the laminating step P4.

Further, in the present embodiment, the metal electrode 14 is fixed to the wiring sheets 16a and 16b by the adhesive, and it is not necessary to use an adhesive. That is, the metal electrode 14, the wiring sheets 16a, 16b, and the like can be laminated on the solar battery pack. The two faces 12a and 12b of the pool 12 are thermocompression bonded by the laminate body 36 by the laminating step P4, whereby the wiring sheets 16a, 16b of the sealing material are dissolved and solidified, that is, it is not necessary to pass through the adhesive and only physically contact. The metal electrode 14 is fixed to the wiring sheets 16a, 16b.

However, the above description is only one embodiment, and the present invention can be implemented in various modifications and improvements in accordance with the knowledge of those skilled in the art.

10‧‧‧Solar battery module

12‧‧‧Solar battery cell

14‧‧‧Metal electrode

14a‧‧‧ Busbar electrodes

14b‧‧‧ finger electrode

14c‧‧‧Connecting Department

16b‧‧‧Wiring sheet (transparent sheet)

22‧‧‧ spacers

22a‧‧‧ vertical frame

22b‧‧‧ transverse frame

24‧‧‧ battery storage space

26‧‧‧Insert space

A‧‧‧ size

B, C‧‧‧ equal intervals

II‧‧‧ section line

Claims (13)

A solar cell module in which a solar cell battery is disposed on a transparent sheet on which a metal electrode is disposed, and a contact is formed between the solar cell and the wiring on the transparent metal sheet; The solar battery module is characterized in that the metal electrode has a function of a mark line, and the number of the mark lines on the surface of the solar battery unit is five or more. The solar cell module of claim 1, wherein one of the metal electrodes is disposed on the two sides of the solar cell, and the transparent sheet and the pair of transparent plates are laminated to form the metal electrode contacting the two sides of the solar cell. By heating while pressing, a contact state between the solar cell and the metal electrode can be obtained, and a spacer composed of an insulating composition is disposed between the pair of transparent sheets. The solar cell module of claim 1, wherein one of the metal electrodes is disposed on both sides of the solar cell, and the transparent sheet is laminated to form the metal electrode contacting the two sides of the solar cell, and is on the surface side. a laminated transparent plate is formed on the back side, and the back sheet is laminated and heated to obtain a contact state between the solar cell and the metal electrode; and the pair of transparent sheets are disposed with insulation a spacer formed by the object. The solar cell module of claim 1, wherein the metal electrode has a function of marking a line and a finger. The solar cell module of claim 1, wherein the metal electrode is a metal wire, a metal foil, a thermosetting conductive composition, or a low melting point alloy. The solar cell module according to claim 5, wherein the metal electrode composed of the metal wire or the metal foil is fixed to the transparent portion by a thermosetting transparent adhesive or a thermosetting transparent adhesive containing conductive fine particles. Sheet. The solar cell module according to claim 5, wherein the metal electrode composed of the thermosetting conductive composition is formed by printing a composition composed of metal particles and a binder resin and drying the composition. The solar cell module according to claim 1, wherein the metal electrode line having the function of the mark line has a line width of 0.8 mm or less and an aspect ratio of 1/7 or more. The solar cell module according to claim 1, wherein the metal electrode system having a finger function is 70 or more, the line width is 80 μm or less, and the aspect ratio is 1/7 or more. The solar cell module of claim 1, wherein the transparent sheet is a sealing material, which is PVB or EVA. The solar cell module of claim 1, wherein the solar cell battery is a silicon solar cell battery, a heterojunction solar cell battery, and a compound such as CIGS is a solar cell battery. The solar cell module of claim 2 or 3, wherein the transparent plate is a transparent glass or resin. A method of manufacturing a solar cell module, as in claims 1 to 12 In a method of manufacturing a solar cell module according to any one of the preceding claims, the heating and pressure bonding of the laminated body comprising the solar cell, the transparent sheet, and the transparent plate is performed by pressing and heating And formed once.