JP4947660B2 - Solar cell module and method for manufacturing solar cell module - Google Patents

Description

  The present invention relates to a solar cell module and a method for manufacturing a solar cell module, and more particularly, to a solar cell module and a method for manufacturing a solar cell module that can easily perform insulation treatment of conductive wires.

In recent years, development of clean energy has been demanded due to problems of depletion of energy resources and global environmental problems such as an increase in CO _{2 in} the atmosphere. In particular, solar power generation using solar cells is a new energy source. It has been developed, put into practical use, and is on the path of development.

  In a conventional solar cell, for example, light is received by diffusing an impurity having a conductivity type opposite to that of the silicon substrate on the surface (light receiving surface) on the side on which sunlight is incident of a monocrystalline or polycrystalline silicon substrate. A mainstream product is one in which a pn junction is formed near the surface, one electrode is disposed on the light receiving surface, and the other electrode is disposed on the front surface (back surface) on the opposite side of the light receiving surface.

  A solar cell string is formed by electrically connecting a plurality of solar cells having the above-described configuration with an interconnector, and the plurality of solar cell strings are electrically connected and then sealed with a sealing material such as a resin. The solar cell module is produced by stopping and photovoltaic power generation is performed.

  In FIG. 11, typical sectional drawing of an example of the conventional solar cell module is shown. Here, in the conventional solar cell module, the light receiving surface side electrode (not shown) is formed together with the antireflection film 812 on the light receiving surface on which the texture structure of the silicon substrate 801 is formed, and the back surface side electrode 807 is formed on the back surface. The solar battery string in which the solar battery cells connected by the interconnector 822 is sealed in a sealing material 818 such as a transparent resin. And the glass substrate 817 is installed in the upper surface of the sealing material 818 which sealed the solar cell string, and the weather resistant film 819 is installed in the lower surface, The outer periphery is surrounded by the aluminum frame 820. . In addition, the interconnector 822 at both ends of the solar cell string is provided with a conductor 816 connected to another solar cell string.

FIG. 12 shows a schematic configuration of part of the back side of the solar cell module shown in FIG. Here, although not shown in the figure, the solar cells are arranged in a downward direction on the paper surface of FIG. 12 and connected in series, and each solar cell column constitutes a solar cell string. Moreover, the ends of the interconnectors 822 of adjacent solar cell strings are connected to each other by a conductive wire 816, and the conductive wire 816 is drawn around the outer periphery of the solar cell module and collected in one place. And the conducting wire 816 collected in one place is connected to the terminal box 802 provided with the lead wire 803a, the lead wire 803b, and a bypass diode (not shown). Thereby, the electric current generated in the solar cell module is taken out to the outside by these lead wires 803a and 803b.
JP 2005-340362 A

  However, in the conventional solar cell module having the above structure, it is necessary to draw a plurality of conductors 816 around the outer periphery of the solar cell module and collect them at one place. Therefore, the conductors 816 and the back electrodes of the solar cells or the conductors 816 are electrically connected to each other. In order to prevent connection, it is necessary to perform an insulation process such as covering each surface of the conductor 816, which is an electrical conductor, with an insulating member.

  In view of the above circumstances, an object of the present invention is to provide a solar cell module and a method for manufacturing the solar cell module, which can easily perform insulation treatment of a conducting wire.

The present invention relates to a wiring board in which wiring for electrically connecting solar cells to each other is installed on an insulating substrate, and a plurality of solar cells that are installed on the wiring of the wiring board and are electrically connected to each other. Is installed in an insulating sealing material, one end of a conducting wire for taking out current to the outside is electrically connected to the wiring, and the other end of the conducting wire is from the sealing material The solar cell structure is drawn out to the outside, and at least a part of the surface of the conductive wire between one end of the conductive wire and the other end of the conductive wire is covered with at least one of the insulating substrate and the sealing material. A part of the substrate in at least one of the opposite ends of the battery structure is bent in the opposite side to the light receiving surface side of the solar battery cell and installed in the sealing material, and one end of the conductor and the other end of the conductor At least part of the surface of the conductor between A solar cell module which is coated on the substrate by being sandwiched between the bent portion Ri.

Moreover, the solar cell module of this invention WHEREIN: The insulation process does not need to be performed on the surface of conducting wire .

  In the solar cell module of the present invention, it is preferable that at least a part of the wiring includes at least one selected from the group consisting of copper, aluminum, and silver.

  In the solar cell module of the present invention, the insulating substrate is a flexible insulating substrate including at least one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyimide, and ethylene vinyl acetate. Is preferred.

  In the solar cell module of the present invention, the solar cell is a back electrode type solar cell including a p-type electrode and an n-type electrode on the back surface opposite to the light receiving surface side of the solar cell. Is preferred.

Furthermore, the present invention is a method for manufacturing the solar cell module, wherein the solar cell structure is formed by electrically connecting the solar cells to the wiring provided on the insulating substrate. A step of electrically connecting one end of the conductive wire to the wiring, and a step of bending a part of the insulating substrate at at least one of the opposite ends of the solar cell structure to the side opposite to the light receiving surface side of the solar cell. By covering at least one part of the surface of the conducting wire with the bent portion of the insulating substrate, the insulating substrate and at least one of the sealing material are covered, and the other end of the conducting wire is drawn out from the sealing material. And a step of sealing the solar cell structure in a sealing material .

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the solar cell module which can perform the insulation process of conducting wire simply, and a solar cell module can be provided.

  Embodiments of the present invention will be described below. In the drawings of the present invention, the same reference numerals represent the same or corresponding parts. Further, in this specification, the surface of the back electrode type solar cell and the solar cell module on which the sunlight is incident is referred to as a light receiving surface, and the surface opposite to the light receiving surface is referred to as a back surface.

<Embodiment 1>
In FIG. 1, typical sectional drawing of an example of the solar cell module of this invention is shown. Here, in the solar cell module of the present invention, for example, the n-type region 104 and the p-type region 105 are respectively formed on the surface exposed from the passivation film 103 formed on the back surface of the p-type or n-type silicon substrate 101. Has been. An n-type electrode 106 is formed on the n-type region 104, and a p-type electrode 107 is formed on the p-type region 105. An antireflection film 102 is formed on the light receiving surface of the silicon substrate 101. The back electrode type solar battery cell 100 having the above configuration is included. The light receiving surface of the silicon substrate 101 has a texture structure.

  The n-type electrode 106 and the p-type electrode 107 of the back electrode type solar cell 100 are electrically connected to the n-type wiring 109 and the p-type wiring 110 installed on the insulating substrate 111, respectively. The n-type electrode 106 of one back electrode solar cell 100 and the p-type electrode 107 of the other back electrode solar cell 100 are electrically connected to each other. By being connected, the adjacent back electrode type solar cells 100 are connected in series to form a solar cell structure.

  Further, the solar cell structure is installed in a sealing material 118 between a transparent substrate 117 made of glass or the like and a back base material 119 made of a weather resistant film or the like, and the wiring substrate of the solar cell structure is It is preferable that both end portions in the connection direction of the back electrode type solar battery cell 100 are bent and installed. When the wiring board is bent, in order to improve workability, it is preferable that a slit 112 is formed in advance at a portion to be bent, or that the insulating rod 121 is bent as an axis. In the present invention, the sealing material 118 can be used without any particular limitation. For example, an insulating transparent resin such as EVA (ethylene vinyl acetate) can be used.

  Furthermore, among the wiring end portion 114d and the wiring end portion 115c installed on the side opposite to the light receiving surface side of the back electrode type solar cell 100 by bending both ends of the solar cell structure, the wiring end portion 114d has a solar cell. One end 204a of a conducting wire for taking out the current generated in the module to the outside is electrically connected. A frame body 120 such as aluminum is fitted so as to surround the outer peripheries of the transparent substrate 117, the sealing material 118, and the back surface base material 119 sealing the solar cell structure.

  FIG. 2 schematically shows a cross section further inside than the cross section of the solar cell module shown in FIG. Here, a conductive wire intermediate portion 204b between one end 204a of the conductive wire described above and the other end of the conductive wire (not shown) is shown, and the conductive wire intermediate portion 204b is arranged so as to be wrapped in a bent portion of the insulating substrate 111. ing.

  In FIG. 3, the typical top view of an example of the back surface side after bending of the wiring board of the solar cell structure used for the solar cell module of this invention and before sealing in a sealing material is shown. Of the wirings formed on the insulating substrate 111, the wiring end portions 114a, 114b, 114c, 114d and the wiring end portions 115a, 115b, 115c are bent to the back side. Here, it is preferable that one end 200a of the conducting wire 200 for taking out current to the outside is temporarily fixed on the wiring end portion 114a by an adhesive member 201a such as an adhesive tape, and the one end 202a of the conducting wire 202 is placed on the wiring end portion 114b. It is preferably temporarily fixed by an adhesive member 201b such as an adhesive tape. By temporarily fixing in this way, the positional deviation of the conducting wires 200 and 202 in the subsequent process is suppressed, and an electrical connection is obtained by vacuum pressure bonding at the time of sealing to the sealing material 118. Such a process of soldering the conducting wires 200 and 202 can be omitted. Note that one end 204a of the conductive wire 200 and one end 203a of the conductive wire 202 can also be temporarily fixed.

  Also, a low-temperature solder that melts below the processing temperature at the time of vacuum pressure bonding for sealing to the sealing material 118, a conductive adhesive that cures below the processing temperature at the time of vacuum pressure bonding, and a processing temperature and pressure at the time of vacuum pressure bonding By applying at least one selected from the group consisting of conductive materials such as connectable ACF (Anisotropic Conductive Film) to the conductive wire and / or the wiring end in advance, the conductive wire and the wiring end simultaneously with the vacuum pressure bonding Therefore, the connection can be simplified and the connection can be made more reliably. Further, as before, before conducting sealing to the sealing material 118, the conductor and the wiring end are connected by at least one selected from the group consisting of solder, conductive adhesive, and conductive material such as ACF. You can also. Here, in this example, the outer surface of the conducting wire 200 and the conducting wire 202 is not insulated.

  The intermediate portions 200b and 204b of the conducting wire 200 following the ends 200a and 204a of the conducting wire 200 enter between the notched portions 300a and 300b provided in the insulating substrate 111 between the bent portions of the wiring substrate, respectively. It is sandwiched between the bent parts. Thereby, at least a part of the surface of the intermediate portions 200b and 204b of the conducting wire 200 is covered with the insulating substrate 111.

  Thereafter, the intermediate portions 200b and 204b of the conducting wire 200 are bent from the end portion of the wiring board after being bent at a substantially right angle between the bent portions of the wiring substrate, and the other ends 200c and 204c of the conducting wire 200 are connected thereto. It continues.

  Also, one end 202a and 203a of the conducting wire 202 are connected to the wiring end portions 114b and 114c, respectively, and the other end 202b and 203b continues to this. A space is provided between the other ends 200c and 204c of the conducting wire 200 and the other ends 202b and 203b of the conducting wire 202, and after the solar cell structure is sealed to the sealing material 118, the spacing is insulative. Since the sealing material 118 is filled, it is possible to insulate without contacting each other.

  Thus, according to the present invention, as in the conventional solar cell module, insulation such as covering the surface of the conductive wire with an insulating film or the like so as not to contact the electrode on the back surface of the back electrode type solar battery cell or other conductive wire. Since it is not necessary to perform the treatment, it is possible to reduce the insulation treatment process and the materials used.

  The other ends 200c and 204c of the conducting wire 200 and the other ends 202b and 203b of the conducting wire 202 are respectively taken out of the solar cell module and connected to, for example, a terminal box provided with a diode or the like.

  In FIG. 4, the typical top view of the back surface of the back electrode type solar cell 100 used for said solar cell module is shown. Here, the n-type electrode 106 and the p-type electrode 107 are each formed in a comb shape on the back surface of the silicon substrate 101, and the n-type electrode 106 and the p-type electrode 107 are engaged with each other. Now it is installed in a staggered manner. Here, each of the n-type electrode 106 and the p-type electrode 107 is preferably formed of a metal material, and particularly preferably formed of a material containing silver.

  In FIG. 5, the typical top view of the wiring board used for said solar cell module is shown. Here, the wiring board is provided with the n-type wiring 109 and the p-type wiring 110 on the surface of the insulating substrate 111 and is electrically connected to the n-type electrode 106 of the back electrode type solar cell 100. Connecting electrode 113 for electrically connecting n-type wiring 109 connected electrically and p-type wiring 110 electrically connected to p-type electrode 107 is provided. .

  Also, any of the wiring end portions 114a, 114b, 114c, 114d, 115a, 115b, and 115c is electrically connected to the p-type wiring 110 and the n-type wiring 109 that are located at the end of the wiring board. When the back electrode type solar cells 100 are connected, the wiring is formed so as to be connected in series as a whole.

  In addition, slits 112 serving as positioning openings are formed in the wiring end portions 114a, 114b, 114c, 114d and the wiring end portions 115a, 115b, 115c, respectively.

  Further, the insulating substrate 111 between the wiring end portion 114a and the wiring end portion 114b is provided with a cut portion 300a, and the insulating substrate 111 between the wiring end portion 114c and the wiring end portion 114d is cut. A portion 300b is provided.

  In FIG. 5, the regions of the n-type wiring 109, the p-type wiring 110, the connection electrode 113, the wiring end portions 114a, 114b, 114c, and 114d and the wiring end portions 115a, 115b, and 115c are indicated by broken lines. Although it is divided, it is not limited to the dividing method shown in FIG.

  FIG. 6 shows a schematic schematic cross-sectional view of a solar cell structure configured by electrically connecting the back electrode type solar cell 100 having the back surface shown in FIG. 4 to the wiring substrate shown in FIG.

  Here, the n-type electrode 106 of the back electrode type solar cell 100 is in contact with and electrically connected to the n-type wire 109 on the wiring substrate, so that the p-type electrode of the back electrode type solar cell 100 is used. The electrode 107 is in contact with and electrically connected to the p-type wiring 110 on the wiring board.

  As described above, in the present invention, electrical connection is possible by installing the wiring board on the back surface of the back electrode type solar cell 100, and the interconnector is connected to the light receiving surface as in the conventional solar cell connection. Therefore, the load on the back electrode type solar cell 100 during the production of the solar cell module can be reduced, and the occurrence of cracks in the back electrode type solar cell 100 can be reduced. Therefore, according to the present invention, it is possible to reduce the load on the back electrode type solar battery cell 100 at the time of manufacturing the solar battery module, so that the back electrode type solar battery cell 100 is made thinner (the thickness of the silicon substrate 101). To 200 μm or less).

  Further, the end of the wiring substrate on which the wiring end portions 114a, 114b, 114c, 114d and the wiring end portions 115a, 115b, 115c are formed is bent to the side opposite to the light receiving surface side of the back electrode type solar cell 100. By sealing the solar cell structure in the sealing material in the state, the degree of freedom in designing the wiring of the wiring board is increased. As a result, by increasing the width of the wiring end and increasing the cross-sectional area, the series resistance between the back electrode type solar cells 100 can be reduced. A solar cell module of F can be manufactured.

  In addition, from the viewpoint of reducing the series resistance between the back electrode type solar cells 100 by widening the width of the wiring end portions, the wiring end portions 114a and 114b that are portions where the connection direction of the back electrode type solar cells 100 is reversed. , 114c, 114d and the wiring end portions 115a, 115b, 115c may be electrically connected. The conductive member is not particularly limited as long as it is a member made of a conductive material. For example, a conventionally known interconnector used in the solar cell field may be used. .

  In FIG. 7, the typical top view of an example of the light-receiving surface side before bending of the solar cell structure which comprises said solar cell module is shown.

  In this example, 24 back electrode type solar cells 100 are arranged in the form of 6 columns × 4 rows on the wiring of the wiring board to form a solar battery structure, and at the end of the wiring board The wiring board is bent along a broken line AA and a broken line BB corresponding to the provided slit 112 and sealed in a sealing material, whereby the solar cell module having the above configuration is obtained.

  Here, between the wiring end 114a and the wiring end 115a, between the wiring end 115a and the wiring end 114b, between the wiring end 114b and the wiring end 115b, between the wiring end 115b and the wiring end 114c, and the wiring end. The back electrode solar cells 100 arranged between 114c and the wiring end portion 115c and between the wiring end portion 115c and the wiring end portion 114d are electrically connected in series with the adjacent back electrode type solar cells 100, respectively. .

  In the solar cell module, the solar cell in the connection direction of the back surface electrode type solar cell 100 of the solar cell structure shown in FIG. 7, for example, because the width of the wiring is increased in order to reduce the connection resistance. The length L2 of the structure before bending may be longer than the length L1 of the solar cell module in the connection direction of the back electrode type solar cell 100 shown in FIG.

  However, in the present invention, even in such a case, the wiring substrate portions at both ends of the solar battery structure are sealed in a state where the light receiving surface side of the back electrode type solar cell 100 is bent. Since the solar cell module is manufactured, the filling rate, which is the ratio of the total area of the light receiving surface of the back electrode type solar cell 100 to the area of the light receiving portion of the solar cell module, can be improved. Power generation efficiency can be improved. In the present invention, the connection resistance can be reduced by widening the wiring width of the wiring board. Characteristics such as F can also be improved.

  Hereinafter, an example of a method for manufacturing the solar cell module will be described with reference to the schematic cross-sectional views of FIGS.

  First, as shown in FIG. 8A, the solar cell structure is manufactured as described above, and the insulating rod 121 is installed below the slits 112 formed at both ends of the solar cell structure. . Here, as the insulating rod 121, a rod having a diameter of about 1 to 2 mm made of an insulating material such as acrylic can be used. Moreover, from the viewpoint of suppressing the occurrence of cracking of the back electrode type solar battery cell 100, the rod 121 is disposed at the end in the connection direction of the back electrode type solar battery cell 100, for example, as shown in FIG. It is preferable to be installed on the outside of the back electrode type solar battery cell 100. The slit 112 is preferably formed to a size that does not affect the resistance of the wiring on the wiring board.

  Next, as shown in FIG. 8B, after one end 204a of the wiring 200 is connected to the wiring end 114d of the wiring board, the insulating substrate 111 at both ends of the solar cell structure with the rod 121 as an axis. Is bent to the side opposite to the light receiving surface side of the back electrode type solar cell 100. Here, the wiring board is bent so as to wrap around a part of the wiring 200 extending from the cut portion 300 b provided in the insulating substrate 111.

  By bending in this way, it is possible to improve the filling rate, which is the ratio of the total area of the light receiving surface of the back electrode type solar cell 100 to the area of the light receiving portion of the solar cell module, so that the power generation efficiency of the solar cell module can be improved. Can be improved. Moreover, the connection of the conducting wire 200 and the conducting wire 202 may be before the wiring board is bent or after the wiring board is bent.

  Further, here, a description has been given of a mode in which the bar 121 is installed with the slit 112 as the bending position, and the wiring board portions at both ends of the solar cell structure are bent with the bar 121 as an axis. May be bent to the side opposite to the light-receiving surface side of the back electrode type solar cell 100 with the slit 112 being a bending position without installing the bar 121. However, when the folding is performed without using the bar 121, there is a possibility that the crease at the bent portion becomes an acute angle and the wiring may be disconnected, so that the load on the bent portion is bent by bending the bar 121 as an axis. Therefore, it is preferable that the bar 121 is used and the bar 121 is bent as an axis. The bar 121 may be removed when the solar cell structure is sealed, or may be left as it is.

  Thereafter, as shown in FIG. 8 (c), in a state where the wiring board portions at both ends of the solar cell structure are bent to the side opposite to the light receiving surface side of the back electrode type solar cell 100, a transparent material such as glass is used. Sealing is performed in a sealing material 118 such as a transparent resin between the substrate 117 and a back surface base material 119 such as a weather resistant film. Thereafter, a frame body 120 made of aluminum or the like is fitted into the outer periphery of the transparent substrate 117, the sealing material 118, and the back surface base material 119, whereby the solar cell module having the above configuration is manufactured. Here, in the solar cell structure, the surfaces of the intermediate portions 200b and 204b of the conducting wire 200 are covered with at least one of the insulating substrate 111 and the sealing material 118, and the other ends 200c, 202b, and 203b of the conducting wires 200 and 202 are covered. , 204c are pulled out from the sealing material 118 and sealed in the sealing material 118.

  The insulating substrate 111 can be used without any particular limitation as long as it is an insulating substrate, and among these, selected from the group consisting of PET (polyethylene terephthalate), PEN (polyethylene naphthalate), polyimide, and ethylene vinyl acetate. It is preferable to use an insulating substrate such as at least one flexible film. When an insulating substrate such as a flexible film as described above is used as the insulating substrate 111, at least one of both end portions of the wiring substrate can be easily bent.

  In the above, each of the n-type wiring 109, the p-type wiring 110, the connection electrode 113, the wiring end portions 114a, 114b, 114c, 114d and the wiring end portions 115a, 115b, 115c is a silver member. It is preferable to use a metal material containing at least one selected from the group consisting of copper and aluminum.

  In the present invention, as described above, as the solar cell, a back electrode type solar cell in which both the p-type electrode and the n-type electrode are formed on the back surface of the semiconductor substrate such as a silicon substrate. Is preferably used.

  In the present invention, a semiconductor substrate other than a silicon substrate may be used, and p-type and n-type conductivity types may be interchanged.

<Embodiment 2>
FIG. 9 shows a schematic plan view when a part of an example of the solar cell module of the present invention is viewed from the light receiving surface side. FIG. 10 shows a schematic plan view when a part of the solar cell module of FIG. 9 is viewed from the back side. In this example, the solar cell structure is characterized in that its end is sealed in a sealing material without being bent. In FIG. 9 and FIG. 10, the description of the transparent substrate 117, the sealing material 118, and the frame body 120 is omitted for convenience of explanation.

  Here, one end 200a of the conducting wire 200 for taking out the current generated in the solar cell module is connected to the wiring end 114a by solder or the like, and one end 204a of the conducting wire 200 is soldered to the wiring end 114d or the like. Connected by. In addition to the solder, the connection may be made by the same method as described in the first embodiment.

  Then, an intermediate portion 200b of the conducting wire 200 following the one end 200a of the conducting wire 200 enters the back side of the wiring substrate from a notch 300a provided in the insulating substrate 111, and is bent at a substantially right angle on the back side of the wiring substrate. ing. Further, an intermediate portion 204b of the conducting wire 200 following the one end 204a of the conducting wire 200 enters the back side of the wiring board from a notch 300b provided in the insulating substrate 111, and is bent at a substantially right angle on the back side of the wiring board. ing. Then, the other end 200 c of the conducting wire 200 continues to the intermediate portion 200 b of the conducting wire 200.

  In addition, the one ends 202a and 203a of the conducting wire 202 for taking out current to the outside are respectively fixed to the wiring end portion 114b and the wiring end portion 114c with solder or the like in the same manner as described above. The conductive wire 202 is bent at a substantially right angle and then proceeds to the back side of the insulating substrate 111 by the notch 300c, and continues to the other ends 202b and 203b of the conductive wire 202, respectively.

  Even when the surfaces of the conductive wire 200 and the conductive wire 202 are not insulated, the contact between the conductive wire 200 and the wiring end portions 114b and 114c causes the conductive wire 200 to move from the cut portions 300a and 300b of the insulating substrate 111 to the back side of the wiring substrate. It can avoid by making it approach, and since the insulation insulating board | substrate 111 exists between these, the contact with conducting wire 200,202 and the back electrode type photovoltaic cell 100 can also be avoided. In addition, a gap is provided between the other ends 200c and 204c of the conducting wire 200 and the other ends 202b and 203b of the conducting wire 202. After sealing the solar cell structure in the sealing material 118, an insulating seal is provided. Since the stoppers 118 are filled in the gaps, they can be insulated without contacting each other.

  Thus, also in this example, the outer surface of each conducting wire 200, 202 for taking out the current generated in the solar cell module to the outside is the insulating substrate 111 and the sealing material 118 inside the solar cell module. Therefore, it is not necessary to insulate the outer surfaces of the conductors 200 and 202 because the electrical contact between the conductors 200 and 202 inside the solar cell can be avoided. Therefore, also in this example, since the conducting wires 200 and 202 can be electrically insulated from each other by using an insulating member constituting the solar cell module, an insulation treatment is performed on each surface of the conducting wires 200 and 202. Since there is no need to carry out, it is possible to easily perform the insulation treatment of the conducting wire. Other explanations are the same as those in the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the solar cell module which can perform the insulation process of conducting wire simply, and a solar cell module can be provided.

It is typical sectional drawing of an example of the solar cell module of this invention. It is typical sectional drawing inside further than the cross section of the solar cell module shown by FIG. It is a typical top view of an example of the back surface side after the insulation board | substrate of the solar cell structure used for the solar cell module of this invention is bent, and before sealing in a sealing material. It is a typical top view of the back surface of an example of the back electrode type photovoltaic cell used for the solar cell module of the present invention. It is a typical top view of the wiring board used for the solar cell module of this invention. It is a typical schematic sectional drawing of the solar cell structure comprised by electrically connecting the back surface electrode type photovoltaic cell which has a back surface shown in FIG. 4 to the wiring board shown in FIG. It is a typical top view of an example of the light-receiving surface side before the bending of the solar cell structure which comprises the solar cell module of this invention. (A)-(c) is typical sectional drawing illustrated about an example of the method of manufacturing the solar cell module of this invention. It is a typical top view when a part of example of the solar cell module of this invention is seen from the light-receiving surface side. FIG. 10 is a schematic plan view when a part of the solar cell module of FIG. 9 is viewed from the back side. It is typical sectional drawing of an example of the conventional solar cell module. It is a typical block diagram of a part of back surface side of the solar cell module shown in FIG.

Explanation of symbols

  100 back electrode type solar cell, 101 silicon substrate, 102 antireflection film, 103 passivation film, 104 n-type region, 105 p-type region, 106 n-type electrode, 107 p-type electrode, 109 n-type wiring, 110 P-type wiring, 111 insulating substrate, 112 slit, 113 connection electrode, 114a, 114b, 114c, 114d, 115a, 115b, 115c wiring end, 117 transparent substrate, 118 sealing material, 119 back substrate, 120 Frame, 121 Bar, 200, 202 conductor, 200a, 202a, 203a, 204a One end of conductor, 200b, 204b Middle part of conductor, 200c, 202b, 203b, 204c The other end of conductor, 201a, 201b Adhering member, 300a , 300b, 300c notch, 801 silicon Substrate, 802 terminal box, 803a, 803b lead wire, 807 back side electrode, 812 antireflection film, 816 lead wire, 817 glass substrate, 818 sealing material, 819 weather resistance film, 820 aluminum frame, 822 interconnector.

Claims (6)

A solar cell structure comprising an insulating substrate on which wiring for electrically connecting solar cells is installed, and a plurality of solar cells that are installed on the wiring on the substrate and are electrically connected The body is installed in an insulating sealing material,
One end of a conducting wire for extracting current to the outside is electrically connected to the wiring and the other end of the conducting wire is drawn out from the sealing material,
At least a part of the surface of the conducting wire between one end of the conducting wire and the other end of the conducting wire is covered with at least one of the substrate and the sealing material;
In the solar cell structure, a part of the substrate at at least one of the opposite ends of the solar cell structure is bent in the opposite side to the light receiving surface side of the solar battery cell and installed in the sealing material. And
At least a part of the surface of the conducting wire between one end of the conducting wire and the other end of the conducting wire is covered with the substrate by being sandwiched between the bent portions of the substrate, Battery module. The solar cell module according to claim 1, wherein the surface of the conducting wire is not insulated. The solar cell module according to claim 1, wherein at least a part of the wiring includes at least one selected from the group consisting of copper, aluminum, and silver. The substrate is polyethylene terephthalate, and wherein the polyethylene naphthalate is a substrate having flexibility comprising at least one selected from the group consisting of polyimide and ethylene vinyl acetate, any of claims 1 to 3 The solar cell module according to. The solar cell is a back electrode type solar cell including a p-type electrode and an n-type electrode on the back surface opposite to the light-receiving surface side of the solar cell. To 4. The solar cell module according to any one of 4 to 4 . A method for manufacturing the solar cell module according to claim 1, comprising:
Forming the solar cell structure by electrically connecting the solar cells to the wiring of the substrate;
Electrically connecting one end of the conducting wire to the wiring;
A step of bending a part of the substrate at at least one of the opposite ends of the solar cell structure to the side opposite to the light receiving surface side of the solar cell;
At least a part of the surface of the conductive wire is sandwiched between the bent portions of the substrate to cover at least one of the substrate and the sealing material, and the other end of the conductive wire is drawn out from the sealing material. A step of sealing the solar cell structure in the sealing material as described above.

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