JP2012142633A - Solar cell module and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately secure dielectric strength voltage between a back electrode of a solar cell and an opening end surface of a back surface protection member.SOLUTION: An insulation sheet 11e is disposed between a back electrode of a solar cell 55 and a back surface protection member 65 so as to cover an entire periphery of an edge part of an opening 65a in the back surface protection member 65. The insulation sheet 11e is formed in a size which covers the entire opening 65a of the back electrode protection member 65 and is disposed between the back electrode of the solar cell 55 and the lead wire 63. One edge part 11e1 of the insulation sheet 11e is disposed on a lower surface side of the lead wire 63, and the other edge part 11e2 is bonded or adhered and secured to a lower surface of the other edge part of the opening 65a.

Description

The present invention, on the back side conductive finest solar battery cell, solar cell module and the lead wire, and a back surface protective member having an opening for deriving an output lead portion of the lead wire are sequentially laminated and it relates to a manufacturing method thereof, and more particularly, to a dielectric strength structure between the back electrodes and back protective member of the solar cell.

  2. Description of the Related Art Solar power generation systems that perform solar power generation by laying solar cell modules in which a plurality of solar cell strings are arranged in a matrix on the roof of a building or the like have begun to spread widely. In such a solar cell power generation system, each solar cell module is provided with a terminal box that can be electrically connected to other solar cell modules installed adjacent to each other.

  One structural example of the solar cell string which comprises the conventional solar cell module is shown to FIG. 23 (a), (b), and FIG. However, FIGS. 23A and 23B are explanatory diagrams showing two scenes of the manufacturing process, and FIG. 24 is an explanatory diagram showing a process of laminating and sealing the solar cell string. A configuration example of the solar cell string shown in FIGS. 23 and 24 is also described in Patent Document 1.

  Although not shown, the solar battery cell 115 is formed by laminating a transparent electrode film made of a transparent conductive film, a photoelectric conversion layer, and a back electrode film in this order, although not shown.

  As shown in FIG. 23A, the solar battery 115 configured in this way has a long and narrow strip shape, and has a length extending over almost the entire width of the light-transmitting insulating substrate 111, and the adjacent solar battery cells 115. 115, one transparent electrode film and the other back electrode film are connected to each other to form a solar cell string 116 in which a plurality of solar cells 115 are connected in series.

  On the end of the transparent electrode film of the solar cell 115 at one end in the solar cell string 116, a linear P-type electrode terminal portion 117 having substantially the same length as the solar cell 115 is formed, and the other end A linear N-type electrode terminal portion 118 having substantially the same length as that of the solar battery cell 115 is formed on the end portion of the back electrode film of the solar battery cell 115. These P-type electrode terminal portion 117 and N-type electrode terminal portion 118 serve as an electrode extraction portion.

  An insulating sheet 119 is laid on the solar cell string 116 so as to extend between the central portion of the P-type electrode terminal portion 117 and the central portion of the N-type electrode terminal portion 118. The insulating sheet 119 is laid so as not to overlap the P-type electrode terminal portion 117 and the N-type electrode terminal portion 118. As the insulating sheet 119, a film having good compatibility with the sealing material is preferable, and among them, a PET film, a fluororesin film, and the like are optimal. Further, in order to ensure the adhesiveness of the insulating sheet, an adhesive resin sheet may be laid between the insulating sheet 119 and the solar battery cell 115 or between the insulating sheet 119 and the lead wire 112 or 113. Alternatively, it may be bonded in advance with an adhesive or the like.

  On the other hand, a positive electrode current collector 120 called a bus bar made of a copper foil having the same shape and size as the P-type electrode terminal portion 117 is electrically and mechanically joined to the entire surface of the P-type electrode terminal portion 117. Similarly, a negative electrode current collector 121 having the same shape and size as the N-type electrode terminal portion 118 is electrically and mechanically joined to the entire surface of the N-type electrode terminal portion 118. As these joining means, soldering or conductive paste can be used.

  On the insulating sheet 119, a positive electrode lead wire 122 and a negative electrode lead wire 123 made of a flat cable are arranged in a straight line (or in a parallel state shifted in the width direction) with their tip portions facing each other. ing.

  One end of the positive electrode lead wire 122 is connected to the center position of the positive electrode current collector 120. Further, the other end portion of the positive electrode lead wire 122 is located at a substantially central portion of the solar cell string 116 and is bent so as to rise from the surface of the solar cell string 116 (for example, in a direction perpendicular to the surface). It is an output lead part 122a. Similarly, one end of the negative electrode lead wire 123 is connected to the center position of the negative electrode current collector 121. Further, the other end portion of the negative electrode lead wire 123 is positioned substantially at the center of the solar cell string 116 and is bent so as to rise from the surface of the solar cell string 116 (for example, in a direction perpendicular to the surface). It is an output lead part 123a.

  Although the positive electrode lead wire 122 and the negative electrode lead wire 123 extend over the plurality of solar cells 115, the insulating sheet 119 is interposed between the solar cells 115. There is no short circuit. The width of the insulating sheet 119 is preferably sufficiently larger than the width of the positive electrode lead wire 122 and the negative electrode lead wire 123, and is arranged in the form of a single sheet from the positive electrode current collector 120 to the negative electrode current collector 121. Yes.

  In this state, as shown in FIG. 24, in the state where the output lead portions 122a and 123a of the positive lead wire 122 and the negative lead wire 123 are led out from the opening portions 124a and 124a and the opening portions 125a and 125a, respectively. 124 and a back film 125 as a back surface protection material for weather resistance and high insulation are laminated and sealed on the entire surface of the solar cell string 116. As the sealing film 124, a thermoplastic polymer film is preferable, and those made of EVA (ethylene vinyl acetate resin) or PVB (polyvinyl butyral resin) are most suitable. Further, as the back film 125, in order to ensure moisture resistance, a three-layer structure of PET / Al / PET (PET: polyethylene terephthalate) or a three-layer structure of PVF / Al / PVF (PVF: polyvinyl fluoride resin film) is used. What contains a moisture-proof layer is preferable.

  In the solar cell string 116 thus configured, the output lead portions 122a and 123a of the positive electrode lead wire 122 and the negative electrode lead wire 123 projecting upward from the openings 125a and 125a of the back film 125, respectively. A terminal box (not shown) is attached and electrically connected.

  By the way, when the opening 125a is formed in the back film 125 having the three-layer structure by punching or the like, the Al layer is exposed at the end face of the opening 125a. Therefore, the distance between the exposed end face of the Al layer and the back electrode film of the solar battery cell 115 becomes close, and there is a possibility of discharging when the dielectric strength test is performed. In particular, recent solar cell modules have been increased in voltage, and a high voltage is required as a withstand voltage. Therefore, there is a high possibility that an accident due to discharge will occur with the above structure.

  Further, as a problem different from the withstand voltage between the end face of the Al layer of the back film 125 and the back electrode film, in the solar cell module having the above configuration, the openings 125a and 125a and the output lead portions of the back film 125 are provided. There is a possibility of contact with 122a and 123a. That is, since there is nothing that fixes the relative positions of the openings 125a and 125a and the output lead portions 122a and 123a, depending on the bending angle of the output lead portions 122a and 123a, the output lead portion There is a possibility that 122a and 123a come into contact with the openings 125a and 125a of the back film 125. When the output lead portions 122a and 123a come into contact with the openings 125a and 125a of the back film 125, the output lead portions 122a and 123a come into contact with the end face of the Al layer of the opening 125a, and the bipolar lead wires 122 and 123 are connected. There is a possibility of short circuit. Therefore, a device for preventing such a short circuit between the output lead portions 122a and 123a and the end surface of the opening 125a has been conventionally used (for example, see Patent Document 2).

  As shown in FIGS. 5D and 6E, the thin-film solar cell module of Patent Document 2 is a Tedler sheet having a notch slightly larger than the hole of the protective cover on the filler sheet. The small piece is set around the solder-plated copper foil (the output lead portions 122a and 123a having the above-described configuration), the EVA sheet piece 12 having substantially the same size is set, and then the back protective cover is set from above. ing. And by taking out the solder-plated copper foil from the opening of the back surface protection cover and fixing it at a position where the copper foil and the back surface protection cover do not contact with the heat-resistant tape, it is possible to prevent a short circuit without shifting in the vacuum laminating process. Are listed.

Japanese Patent Laid-Open No. 9-326497 JP 2001-77385 A

  As described above, Patent Document 2 solves the short circuit caused by the contact between the end face of the Al layer exposed at the end face of the opening of the back film and the output lead portion. However, no consideration was given to the possibility of a discharge occurring between the exposed end face of the Al layer and the back electrode film of the solar battery cell when conducting a dielectric strength test. It has not been. As described above, recent solar cell modules have been increased in voltage, and a high voltage is required as a withstand voltage.

The present invention has been made in order to solve the above problems, its object is the sun which can sufficiently secure a withstand voltage between the opening end surface of the back electrodes and back protective member of the solar cell A battery module and a manufacturing method thereof are provided.

To solve the above problems, a solar cell module of the present invention, the back side conductive finest solar battery cell, a lead wire, sheet having an opening for deriving an output lead portion of the lead wire a sealing insulating member, a solar cell module and a sheet-like back surface protection member are sequentially laminated with an opening for deriving an output lead portion of the lead wire, the back surface protective member and the back surface electrodes between, the is the opening edge insulation sheet so as to cover the entire circumference of the arrangement of the back surface protective member, wherein the insulating sheet is formed in a size to cover the entire opening of the back protective member And disposed between the back electrode and the lead wire, one edge of the insulating sheet is disposed on the lower surface side of the lead wire, and the other edge is the other edge of the opening. adhesive or paste fixed to the lower surface The one in which was constructed. The lead wire is covered with an insulating member except for the output lead portion.

Moreover, the manufacturing method of the solar cell module according to the present invention includes a sheet-like sealing insulating member having a lead wire and an opening for leading out an output lead portion of the lead wire on the back electrode of the solar cell. And a sheet-like back surface protection member having an opening for leading out the output lead portion of the lead wire in order, the solar cell module manufacturing method, between the back electrode and the lead wire The insulating sheet is formed so as to cover the entire periphery of the opening portion of the back surface protection member so as to cover the entire opening portion, and one edge portion of the insulating sheet is formed of the lead wire. A step of arranging so as to overlap an end portion of the insulating film arranged on the lower surface side, and a step of adhering or pasting and fixing the other edge of the insulating sheet to the lower surface of the other edge of the opening. Including and Those were.

As described above, when the back surface protection member includes a moisture-proof layer such as a PET / Al / PET three-layer structure or a PVF / Al / PVF three-layer structure, the end surface of the Al layer has an end surface of the Al layer. Will be exposed. Therefore, there is a possibility that discharge occurs between the back electrodes of the end surface and the solar cell module of the Al layer, in the present invention, between the rear surface electrodes and the back surface protective member, the opening of the back side protective member Since the insulating sheet is arranged so as to cover the entire periphery of the edge of the part, the discharge is prevented. Therefore, even if a dielectric strength test is performed at a high voltage corresponding to a high-voltage solar cell module, a sufficient dielectric strength can be ensured without discharging.

Further, according to the present invention, the insulating sheet is disposed between the sealing insulating member and the lead wire, a structure for fixing the lead wires on the rear surface electrostatic best by the insulating sheet lower surface of the adhesive Also good. That is, according to the present invention, the insulating sheet, in addition to the original function of insulating the opening end surface of the back electrodes and back protective member, to secure the wired arrangement position of the lead wire on the back surface electrode It also functions as a fixing member. Thereby, it is possible to securely arrange and fix the lead wire at a position where it does not contact the end face of the opening of the back surface protection member only by disposing the insulating sheet.

Also, by arranging between the back electrodes and lead wire insulation sheet covering the lower surface of the lead wire may be a to the extent that partially overlaps the edge of the insulating sheet, the lead wire up to the previous There is no need to cover the insulating film. Therefore, when the lead wire is bent so as to rise from the opening of the back surface protection member, since there is no insulating film in the bent portion, the lead wire can be easily bent at an arbitrary angle desired by the user.

Further, the solar cell module of the present invention includes a sheet-shaped sealing insulating member having a lead wire and an opening for leading an output lead portion of the lead wire on the back electrode of the solar cell, and the lead A solar cell module in which a sheet-like back surface protection member having an opening for leading out an output lead portion of a wire is sequentially laminated, and the back surface protection member is interposed between the back surface electrode and the back surface protection member An insulating sheet is disposed so as to cover the entire periphery of the edge of the opening, and the insulating sheet is formed to have a size covering the entire opening of the back surface protection member, and the lead wire and the back surface The lead wire is arranged between the protective member, the lead wire is folded in half so as to sandwich the end portion of the insulating sheet, and then led upward from the opening of the back surface protective member.The lead wire is a lead wire in a state where the lower surface side is covered with an insulating film and the upper surface side is exposed.

Moreover, the manufacturing method of the solar cell module according to the present invention includes a sheet-like sealing insulating member having a lead wire and an opening for leading out an output lead portion of the lead wire on the back electrode of the solar cell. And a sheet-like back surface protection member having an opening for leading out the output lead portion of the lead wire in order, wherein the lower surface side is covered with an insulating film and the upper surface side is exposed An insulating sheet formed between the lead wire in the state and the back surface protection member so as to cover the entire edge of the opening of the back surface protection member and covering the entire opening. And the lead wire is folded in half so as to sandwich the end of the insulating sheet, and then guided upward from the opening of the sealing insulating member and the opening of the back surface protection member. It is characterized by comprising the steps of, a.

  According to such a configuration, the coating of the lead wire with the insulating film may be a single-side coating with the back electrode, and the coating of the other surface of the bent portion of the lead wire is unnecessary. Therefore, it is easy to bend the lead wire while maintaining insulation.

Further, according to the present invention, the insulating sheet may have a configuration in which any one end other than the end sandwiched between the lead wires is bonded or fixed to the lower surface of the edge of the opening. Good.

  That is, when the lead wire is folded in half at the end portion of the insulating sheet, there is a possibility that the insulating sheet side may be shifted. However, as in the present invention, either end portion of the insulating sheet is connected to the lower surface of the edge of the opening. By adhering or affixing to the insulating sheet, the insulating sheet can be prevented from shifting, and the insulating sheet can be reliably disposed and fixed at an appropriate position covering the entire opening.

Since the present invention constituted as described above, it is possible to reliably prevent the discharge between the opening end surface of the back electrodes and back protective member of the solar cell module. Thereby, even if a dielectric strength test is performed at a high voltage, a sufficient dielectric strength voltage can be obtained without discharging, so that the solar cell module can be increased in voltage.

The structural example 1 of the solar cell module which concerns on this Embodiment is shown, (a), (b) has shown the two scenes of the manufacturing process. It is explanatory drawing which shows the process of carrying out the lamination sealing of the solar cell string. It is a perspective view which expands and shows a peripheral part of an output lead part partially. It is a perspective view which expands and partially shows the peripheral part of the output lead part applied to the structural example 2 of the solar cell module according to the present embodiment. It is a top view of the opening part periphery which shows the shape and arrangement configuration of the insulating sheet of the specific example 1. It is sectional drawing (end view) around the opening part which shows the shape and arrangement configuration of the insulating sheet of the specific example 1. (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 2, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 3, (b) is sectional drawing (end view). (A) is a top view around the opening part which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 4, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 5, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 6, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement structure of the insulating sheet of the specific example 7, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 8, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 9, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement configuration of the insulating sheet of the specific example 10, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement structure of the insulating sheet of the specific example 11, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement configuration of the insulating sheet of the specific example 12, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement configuration of the insulating sheet of the specific example 13, (b) is sectional drawing (end view). (A) is a top view around the opening part which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 14, (b) is sectional drawing (end view). (A) is a top view around the opening part which shows the shape and arrangement | positioning structure of the insulating sheet of the specific example 15, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement configuration of the insulating sheet of the specific example 16, (b) is sectional drawing (end view). (A) is a top view of the opening part periphery which shows the shape and arrangement structure of the insulating sheet of the specific example 17, (b) is sectional drawing (end view). The example of 1 structure of the conventional solar cell string is shown, (a), (b) has shown the two scenes of the manufacturing process. It is explanatory drawing which shows the process of carrying out the lamination sealing of the conventional solar cell string.

  Embodiments of the present invention will be described below with reference to the drawings.

<Description of Configuration Example 1 of Solar Cell Module>
1A, 1B, and 2 show a configuration example 1 of the solar cell module according to the present embodiment. However, FIGS. 1A and 1B are explanatory diagrams showing two scenes of the manufacturing process, and FIG. 2 is an explanatory diagram showing a process of laminating and sealing the solar cell string.

The solar battery cell 55 is formed on the translucent insulating substrate 51 by laminating a transparent electrode film, a photoelectric conversion layer, and a back electrode film (back electrode) made of a transparent conductive film, which are not shown, in this order. ing. As the light-transmitting insulating substrate, there are heat-resistant resins such as glass and polyimide. Examples of the transparent electrode film include SnO2, ZnO, and ITO. Examples of the photoelectric conversion layer include silicon-based photoelectric conversion films such as amorphous silicon and microcrystalline silicon, and compound-based photoelectric conversion films such as CdTe and CuInSe ₂ .

  As shown in FIG. 1A, the solar cell 55 configured in this way is a long and narrow strip, has a length that covers almost the entire width of the translucent insulating substrate 51, and is adjacent to the solar cell 55. 55, one transparent electrode film and the other back electrode film are connected to each other, so that a solar cell string 56 in which a plurality of solar cells 55 are connected in series is configured.

  A linear P-type electrode terminal portion 57 having substantially the same length as that of the solar battery cell 55 is formed on the end of the transparent electrode film of the solar battery cell 55 at one end of the solar battery string 56, and the other end. A linear N-type electrode terminal portion 58 having substantially the same length as that of the solar battery cell 55 is formed on the end portion of the back electrode film of the solar battery cell 55. The P-type electrode terminal portion 57 and the N-type electrode terminal portion 58 serve as an electrode extraction portion. As described above, by making the length of the solar battery cell 55 and the length of the electrode terminal portions 57 and 58 all the same, the current flowing in series through the plurality of solar battery cells 55 of the solar battery string 56 locally. Since the current can be taken out uniformly without being concentrated, the occurrence of series resistance loss can be suppressed.

  A positive electrode current collector 60a called a bus bar made of a copper foil having substantially the same shape and size as the P-type electrode terminal portion 57 is electrically and mechanically joined to the entire surface of the P-type electrode terminal portion 57, and N A negative electrode current collector 60 b having substantially the same shape and size as the type electrode terminal portion 58 is electrically and mechanically joined to the entire surface of the N type electrode terminal portion 58. As these joining means, soldering or conductive paste can be used.

  In the above configuration, the positive electrode lead wire 62 made of a flat cable covered with an insulating film (hereinafter referred to as “insulating film”) 61 is disposed on the solar cell string 56 via an EVA sheet 59 disposed for bonding. And the negative electrode lead 63 are arranged in a straight line (or in a parallel state shifted in the width direction) with their tip portions facing each other. However, the EVA sheet 59 for bonding is not always necessary.

  One end portion of the positive electrode lead wire 62 is connected to the center position of the positive electrode current collector 60 a, and the other end portion is positioned substantially at the center portion of the solar cell string 56, with respect to the surface of the solar cell string 56. The output lead portion 62a is bent at a predetermined angle (vertical direction in FIGS. 1 and 2). Similarly, one end portion of the negative electrode lead wire 63 is connected to the center position of the negative electrode current collector 60 b, and the other end portion is positioned substantially at the center portion of the solar cell string 56 and to the surface of the solar cell string 56. The output lead portion 63a is bent at a predetermined angle (vertical direction in FIGS. 1 and 2). Note that the bending angle (predetermined angle) of the output lead portions 62a and 63a is not necessarily limited to the vertical direction because it is related to the shape of the terminal box (not shown), but in FIG. 1 and FIG. Will be described below.

  FIG. 3 is a partially enlarged perspective view of the periphery of the output lead portions 62a and 63a.

  In the present embodiment, the output lead portions 62 a and 63 a are in a state where the lead wire on the tip end side including the bent portion 66 is covered on one side with the insulating film 61. More specifically, the insulating film 61 in this portion is provided on the back electrode film side of the solar cell string 56 of the lead wires 62a and 63a. That is, when the base portion is bent in order to raise the output lead portions 62a and 63a vertically, the insulating film 61 is provided only on one side of the lead wires 62 and 63 at this portion. Due to the weakness and bounce due to, it can be easily bent vertically.

  The positive electrode lead wire 62 and the negative electrode lead wire 63 are made of the same material (that is, copper foil) as the positive electrode current collector 60a and the negative electrode current collector 60b, and as a joining means between each lead wire and the current collector, Soldering or spot welding can be used. The positive electrode lead wire 62 and the negative electrode lead wire 63 extend over the plurality of solar cells 55, but each lead wire 62, 63 is entirely covered with the insulating film 61, so that the plurality of solar cells. 55 is not short-circuited.

  In this state, as shown in FIG. 2, each of the output lead portions 62a and 63a of the positive electrode lead wire 62 and the negative electrode lead wire 63 is inserted into the opening portions 64a and 64a and the opening portions 65a and 65a, respectively. A sealing insulating film 64 that is a sealing insulating member and a back film 65 for weather resistance and high insulation that is a sheet-like back surface protection member are laminated and sealed on the entire surface of the solar cell string 56. The sealing insulating film 64 may be any material having good adhesion to the back film 65, the insulating film 61, and the solar battery cell 55, such as PVB and silicone, and excellent long-term weather resistance. Acetate resin) is the most suitable for solar cells. In particular, if the sealing insulating film 64 and the insulating film 61 are selected to have good adhesion to each other, the waterproofness of the solar cell string can be improved. The back film 65 preferably has a three-layer structure including a moisture-proof layer such as PET / Al / PET (PET: polyethylene terephthalate). As an example of the thickness, the back film 65 is set to 100 μm with respect to the insulating film 61: 50 μm and the sealing insulating film 64: 600 μm.

  In the solar cell string 56 configured as described above, the output lead portions 62a and 63a of the positive electrode lead wire 62 and the negative electrode lead wire 63 protruding upward from the respective openings 65a and 65a of the back film 65, A terminal box (not shown) is attached and electrically connected.

  Note that the electrode arrangement structure of the solar cell string 56 is merely an example, and is not limited to such an arrangement structure. For example, the arrangement position of the positive electrode lead wire 62 and the negative electrode lead wire 63 may be closer to one end side than the central portion of the solar cell string 56, and it is not necessary to draw out to the central portion. That is, the output lead portions 62a and 63a may be arranged so as to protrude upward from the vicinity of the positive electrode current collector 60a and the negative electrode current collector 60b.

<Description of Configuration Example 2 of Solar Cell Module>
In the solar cell string shown in the configuration example 1, the lead wires 62 and 63 are covered with the insulating film 61 from the current collecting portions 60 a and 60 b to the front of the bent portion 66, and include the bent portion 66. The output lead portions 62a and 63a on the front end side are covered on one side with the insulating film 61. However, in the present configuration example 2, as shown in FIG. The entire portion including the bent portion 66 up to the tip end side is covered with the insulating film 61 on one side. More specifically, the insulating film 61 is provided on the back electrode film side of the solar cell string 56 of each of the lead wires 62 and 63. That is, when the base portion is bent in order to raise the output lead portions 62a and 63a vertically, the insulating film 61 is provided only on one side of the lead wires 62 and 63 at this portion. Due to the weakness and bounce due to, it can be easily bent vertically. Further, by providing the insulating film 61 only on one side over almost the entire length of each of the lead wires 62 and 63 as described above, the usage amount of the insulating film can be suppressed to the necessary minimum, and the component cost can be reduced. Can do.

<Description of dielectric strength structure of solar cell module>
In the present embodiment, in the solar cell module configured as described above, an insulating sheet is provided between the back electrode film of the solar battery cell 55 and the back film 65 so as to cover the entire periphery of the edge of the opening 65a of the back film 65. By arranging it, the withstand voltage between the end face of the Al layer exposed at the end face of the opening 65a of the back film 65 and the back electrode film is secured. That is, in the method for manufacturing a solar cell module according to the present embodiment, a solar cell 55 composed of a transparent electrode film, a photoelectric conversion layer, and a back electrode film is laminated on a translucent insulating substrate 51, and this solar cell 55 In the step of sequentially laminating the insulating lead wires 62 and 63 and the back film 65 having the opening 65a for leading out the output lead portions 62a and 63a of the lead wires 62 and 63 on the back electrode film of And a step of disposing an insulating sheet between the back electrode film and the sealing insulating film 64 or the back film 65 so as to cover the entire periphery of the edge of the opening 65a of the back film 65.

  The insulating sheet should just be arrange | positioned along the edge part perimeter of the opening part 65a of the back film 65 at least. In the present embodiment, since the opening 65a has a rectangular shape, when the insulating sheet is, for example, an elongated tape shape (strip shape), a tape-like shape is formed along each edge of the rectangular opening portion 65a. Four insulating sheets may be arranged in a “mouth” shape. Hereinafter, specific examples of the shape and arrangement of the insulating sheet will be described.

[Specific Example 1]
FIG. 5 is a plan view of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet according to the first specific example, and FIG. 6 is a cross-sectional view (accurately, an end view) along the line AA in FIG. Two openings 65a are formed corresponding to the output lead portions 62a and 63a of the respective lead wires 62 and 63, but the shape and arrangement of the insulating sheet are the same for each opening 65a. Now, one opening (the opening 65a on the right side in FIG. 6) will be described.

  In this specific example 1, the insulating sheet includes one strip-shaped insulating sheet 11a disposed along the edge 65a1 on one side of the opening 65a that the lead wire 63 crosses, and the other three that the lead wire 63 does not cross. It consists of another sheet of insulating sheet 11b arranged in a U shape along the edge portions 65a2 to 65a4.

  The strip-shaped insulating sheet 11a is disposed between the lead wire 63 and the sealing insulating film (for example, EVA sheet) 64, and the U-shaped insulating sheet 11b includes the sealing insulating film 64 and the back film. 65. That is, the strip-shaped insulating sheet 11 a is disposed below the sealing insulating film 64, and the U-shaped insulating sheet 11 b is disposed above the sealing insulating film 64.

  The strip-shaped insulating sheet 11a is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive applied to the lower surface, and is formed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65. When arranging, the lead wire 63 is fixed or temporarily fixed on the EVA sheet 59. In other words, the insulating sheet 11 a serves to both insulate the edge 65 a 1 of the opening 65 a and fix the lead wire 63. This prevents the insulating sheet 11a from deviating from the edge 65a1 of the opening 65a during subsequent laminating, and also serves to fix or temporarily fix the arrangement position of the lead wire 63 so as not to deviate. Yes. That is, the lead wire 63 can be securely arranged and fixed at a position where it does not contact the end face of the opening 65a of the back film 65.

  On the other hand, the U-shaped insulating sheet 11b is arranged along the other three side edges 65a2 to 65a4 of the opening 65a of the back film 65, and is fixed to the lower surface of the edges 65a2 to 65a4 by an adhesive or Temporarily fixed. This prevents the insulating sheet 11b from shifting from the edge portions 65a2 to 65a4 on the three sides of the opening 65a during the subsequent laminating process.

  Therefore, by laminating the whole in such a state, the entire periphery of the edge of the opening 65a of the back film 65 is completely covered between the back electrode film of the solar battery 55 and the back film 65. Thus, the insulating sheets 11a and 11b are surely arranged.

[Specific Example 2]
FIGS. 7A and 7B are a plan view and a cross-sectional view (more precisely, an end view) of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of the second specific example. However, FIG. 7 shows a case where the present invention is applied to a solar cell module having the configuration shown in FIG. 3 (that is, a solar cell module in which the lead wires 62 and 63 are coated on both sides). Further, in FIG. 7, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The specific example 2 is different from the specific example 1 in that the specific example 1 has the EVA sheet 59 disposed on the entire back electrode film of the solar battery cell 55, whereas the specific example 2 has an EVA. The only difference is that the sheet 59 is disposed only up to the front of the opening 65a of the back film 65, and the other configurations are the same as those of the first specific example. Therefore, in this case, when the strip-shaped insulating sheet 11a is disposed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lead wire 63 is placed on the back electrode. It will be fixed directly or temporarily fixed on the membrane.

[Specific Example 3]
FIGS. 8A and 8B are a plan view and a cross-sectional view (more precisely, an end view) of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of the third specific example. However, FIG. 8 shows a case where the present invention is applied to the solar cell module having the configuration shown in FIG. 3 (that is, the solar cell module in which the lead wires 62 and 63 are coated on both sides). In FIG. 8, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The difference between this specific example 3 and the above specific example 1 is that the sealing insulating film 64 is formed in the same size as the back film 65 in the above specific example 1, whereas in this specific example 3, this sealing is performed. Instead of the insulating film 64, a lead wire adhesive sheet piece 641 having a width slightly wider than the width of the opening 65a of the back film 65 is disposed along the lead wire 63, and the other configuration is the case of the specific example 1 described above. Is almost the same. Therefore, in this case, the lead wire 63 is fixed or temporarily fixed on the EVA sheet 59 by the strip-shaped insulating sheet 11a and the lead wire adhesive sheet piece 641. In this specific example 3, since the lead wire 63 can be fixed or temporarily fixed on the EVA sheet 59 by the lead wire adhesive sheet piece 641, the insulating sheet 11a is attached to the edge 65a1 on one side of the opening 65a of the back film 65. It may be configured to be fixed or temporarily fixed to the lower surface of the lead wire adhesive sheet piece 641 arranged up to the edge 65a1 on one side of the opening 65 in a state of being arranged along.

[Specific Example 4]
FIGS. 9A and 9B are a plan view and a cross-sectional view (more precisely, an end view) of the periphery of the opening showing the shape and arrangement of the insulating sheet according to the fourth specific example. However, FIG. 9 shows a case where the present invention is applied to the solar cell module having the configuration shown in FIG. 3 (that is, a solar cell module in which the lead wires 62 and 63 are coated on both sides). In FIG. 9, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The specific example 4 differs from the specific example 1 in that the specific example 1 has the EVA sheet 59 disposed on the entire back electrode film of the solar battery cell 55, whereas the specific example 4 has an EVA. The point that the sheet 59 is disposed only up to the opposite edge of the opening 65a of the back film 65, and the specific example 1 is the same as the opening 64a of the sealing insulating film 64 and the opening 65a of the back film 65. Whereas the opening portion is sized, in the present specific example 4, the opening portion 64a of the sealing insulating film 64 is smaller than the opening portion 65a of the back film 65, and the other configuration is the above-described specific example 1. It is the same as the case of. That is, the sealing insulating film 64 is extended to the inside of the opening 65 a of the back film 65. Therefore, in this case, when the strip-shaped insulating sheet 11a is arranged on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lead wire 63 is placed on the EVA sheet. It is fixed on 59 or temporarily fixed. However, the insulating sheet 11a is arranged along the edge 65a1 on one side of the opening 65a of the back film 65 with an adhesive on the lower surface of the sealing insulating film 64 extending in the opening 65. It may be fixed or temporarily fixed.

[Specific Example 5]
FIGS. 10A and 10B are a plan view and a cross-sectional view (more precisely, an end view) around the opening showing the shape and arrangement of the insulating sheet according to the fifth specific example. However, FIG. 10 shows a case where the present invention is applied to a solar cell module having the configuration shown in FIG. 3 (that is, a solar cell module in which the lead wires 62 and 63 are coated on both sides). Further, FIG. 10 shows only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In the present specific example 5, the insulating sheet 11c is composed of a single sheet formed in a “mouth” shape in plan view so as to cover the edge along the entire periphery of the edge of the opening 65a of the back film 65. ing. And the insulating sheet 11c of such a shape is arrange | positioned between the sealing insulating film 64 and the back surface electrode film of the photovoltaic cell 55. FIG. However, in this embodiment, since the EVA sheet 59 for adhesion is disposed between the back electrode film of the solar battery cell 55 and the lead wire 63, more accurately, the insulating sheet 11c is sealed and insulated. It is disposed between the film 64 and the EVA sheet 59.

  The insulating sheet 11 c is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive applied to the lower surface, and the back electrode film of the solar battery cell 55 along the entire circumference of the edges 65 a 1 to 65 a 4 of the opening 65 a of the back film 65. When arranged on the upper side (more precisely, on the EVA sheet 59), the lead wire 63 is fixed on the back electrode film (more precisely, on the EVA sheet 59) by the insulating sheet 11c. That is, the insulating sheet 11c serves to both insulate all the edges 65a1 to 65a4 of the opening 65a and fix the lead wire 63. This prevents the insulating sheet 11c from shifting from all the edge portions 65a1 to 65a4 of the opening 65a and fixes or temporarily fixes the arrangement position of the lead wires 63 during the subsequent laminating process. It also plays a role. In addition, about the adhesive apply | coated to the lower surface of the insulating sheet 11c, you may apply | coat only to the one side part facing the edge part 65a1 of one side of the opening part 65a which the lead wire 63 crosses.

  In this way, after the lead wire 63 is bonded and fixed by the insulating sheet 11c, the whole is laminated so that the opening 65a of the back film 65 is interposed between the back electrode film of the solar battery cell 55 and the back film 65. The insulating sheet 11c is arranged so as to completely cover the entire periphery of the edge.

[Specific Example 6]
FIG. 11 is a cross-sectional view (to be precise, an end view) of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of the sixth specific example. The plan view is the same as FIG.

  In the present specific example 6, the insulating sheet 11d is formed from a single sheet formed in a “mouth” shape in plan view so as to cover the edge along the entire periphery of the opening 65a of the back film 65. It has become. The insulating sheet 11 d having such a shape is disposed between the back film 65 and the sealing insulating film 64.

  The insulating sheet 11d is coated with an adhesive on the outer periphery of the upper surface. When the insulating sheet 11d is disposed along the entire periphery of the edges 65a1 to 65a4 of the opening 65a of the back film 65, the insulating sheet 11d is used as the back film. The insulating sheet 11d is fixed or temporarily fixed to the lower surface of the back film 65 by adhering the positions from the lower surface side of the opening 65a of 65. This prevents the insulating sheet 11d from being displaced from the entire peripheral edge portions 65a1 to 65a4 of the opening 65a during the subsequent laminating process.

  Thereafter, by laminating the whole, the entire periphery of the edge of the opening 65a of the back film 65 is completely covered between the back electrode film of the solar battery cell 55 and the back film 65, so that the insulating sheet is covered. 11d is arranged.

[Specific Example 7]
FIGS. 12A and 12B are a plan view and a cross-sectional view (more precisely, an end view) around the opening showing the shape and arrangement of the insulating sheet of Example 7 according to the present invention . However, FIG. 12 shows a case where the present invention is applied to the solar cell module having the configuration shown in FIG. 3 (that is, the solar cell module in which the lead wires 62 and 63 are coated on both sides). In FIG. 12, only one opening 65a and one opening 65a from which the output lead 63a of one lead wire 63 is led out are shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In this specific example 7, the insulating sheet 11e is formed as a single sheet having a size (indicated by a two-dot chain line in FIG. 12A) covering the entire opening 65a of the back film 65, and is a solar cell. 55 disposed between the back electrode film 55 and the lead wire 63 (more precisely, disposed between the EVA sheet 59 for bonding disposed on the back electrode film of the solar battery cell 55 and the lead wire 63). Has been. And one edge part 11e1 (right edge part in a figure) of the insulating sheet 11e is arrange | positioned so that it may overlap with the edge part 611 of the insulating film 61 arrange | positioned at the lower surface side of the lead wire 63, and the insulating sheet 11e The other edge portion (left edge portion in the figure) 11e2 is bonded or fixed to the lower surface of one edge portion 65a3 of the opening portion 65a of the back film 65 through the opening portion 64a of the sealing insulating film 64. It has been configured.

  Thus, by disposing the insulating sheet 11e between the back electrode film (more precisely, the EVA sheet 59) of the solar battery cell 55 and the lead wire 63, the coating on the lower surface side of the lead wire 63 is an insulating sheet. As long as it partially overlaps with the edge 11e1 of 11e, it is not necessary to cover the lead wire 63 with the insulating film 61 as shown in FIG. Therefore, when the lead wire 63 is bent so as to rise from the opening 65a of the back film 65, since the insulating film 61 is not present in the bent portion, the lead wire 63 can be easily bent at an arbitrary angle desired by the user. it can.

[Specific Example 8]
FIGS. 13A and 13B are a plan view and a cross-sectional view (more precisely, an end view) around the opening showing the shape and arrangement of the insulating sheet of Example 8 according to the present invention . However, FIG. 13 shows a case where the present invention is applied to the solar cell module of Configuration Example 2 shown in FIG. 4 (that is, a solar cell module in which the lead wires 62 and 63 are one-side coated). In FIG. 13, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In this specific example 8, the insulating sheet 11f is formed as a single sheet of a size (indicated by a two-dot chain line in FIG. 13A) that covers the entire opening 65a of the back film 65, and the lower surface side is insulated. It is arranged between the lead wire 63 covered with the film 61 and the upper surface exposed, and the sealing insulating film 64.

  On the other hand, the lead wire 63 passes under the insulating sheet 11f disposed under the opening 65a of the back film 65, and is pulled out to the end portion (left end portion in FIG. 13B) 11f1 of the insulating sheet 11f. Here, after folding back in half so as to sandwich the end portion 11 f 1, it is configured to be led upward from a substantially central portion of the opening 65 a of the back film 65. According to such a configuration, the coating of the lead wire 63 with the insulating film 61 may be a single-sided coating with the back electrode film of the solar battery cell 55, and the coating of the other surface of the bent portion of the lead wire 63 is unnecessary. It becomes. Therefore, it is easy to bend the lead wire 63 in a state where the insulating state by the insulating sheet 11f is maintained.

[Specific Example 9]
14A and 14B are a plan view and a cross-sectional view (more precisely, an end view) around the opening showing the shape and arrangement of the insulating sheet of Example 9 according to the present invention . However, FIG. 14 shows a case where the present invention is applied to the solar cell module of the configuration example 2 shown in FIG. 4 (that is, a solar cell module in which the lead wires 62 and 63 are one-side coated). In FIG. 14, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The configuration of the present specific example 9 is substantially the same as the configuration of the specific example 8 except that the end portion 11f2 opposite to the end portion 11f1 of the insulating sheet 11f where the lead wire 63 is folded back is sealed. This is that the adhesive film is fixed or temporarily fixed to the lower surface of the opening 65a of the back film 65 through the opening 64a of the stop insulating film 64. Thereby, since the insulating sheet 11d does not deviate from the entire peripheral edge portions 65a1 to 65a4 of the opening 65a during the subsequent laminating process, the end face of the Al layer exposed to the end face of the opening 65a of the back film 65 and the sun The battery cell 55 can be reliably insulated from the back electrode film.

[Specific Example 10]
FIGS. 15A and 15B are a plan view and a cross-sectional view (more precisely, an end view) around the opening showing the shape and arrangement of the insulating sheet of this specific example 10. However, FIG. 15 shows a case where the present invention is applied to the solar cell module having the configuration shown in FIG. 3 (that is, the solar cell module in which the lead wires 62 and 63 are coated on both sides). Further, in FIG. 15, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In the specific example 10, the insulating sheet 11g directly covers the end surface of the opening 65a of the back film 65 over the entire circumference. More specifically, the insulating sheet 11g is formed in a planar frame shape so as to cover the entire circumference of the lower surface and upper surface of the edge of the opening 65a and the end surface of the opening 65a. The surface is formed in a substantially U shape. In particular, in order to ensure the withstand voltage between the Al layer end face of the opening 65a and the back electrode film of the solar cell 55, it is important to cover the lower surface of the edge of the opening 65a with the insulating sheet 11g. is there. Thus, by directly covering the end face of the opening 65a with the insulating sheet 11g, discharge between the end face of the Al layer exposed at the end face of the opening 65a and the back electrode film of the solar battery cell 55 is surely prevented. be able to. Therefore, even if a dielectric strength test is performed at a high voltage corresponding to a high-voltage solar cell module, a sufficient dielectric strength voltage can be obtained without discharging.

[Specific Example 11]
16A and 16B are plan views of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of this specific example 11 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 16 shows a case where the present invention is applied to a solar cell module having the configuration shown in FIG. 3 (that is, a solar cell module in which the lead wires 62 and 63 are coated on both sides). Further, in FIG. 16, only one opening 65a and one opening 65a from which the output lead 63a of one lead wire 63 is led out are illustrated, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In this specific example 11, an insulating sheet covering the opening 65a of the back film 65 is not separately provided, but the lower covering insulating film 61b of the lead wire 63 is used as the insulating sheet. That is, the lower covering insulating film 61b of the lead wire 63 is formed to have a width that is slightly wider than the width of the opening 65a of the back film 65 and extends beyond the edge 65a3 on the other side of the opening 65a. Are arranged. Thereby, the edge part of the opening part 65a of the back film 65 can be covered over the perimeter by the extension part 61b1 of the lower side covering insulating film 61b.

[Specific Example 12]
17A and 17B are plan views of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of this specific example 12 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 17 shows a case where the present invention is applied to the solar cell module of Configuration Example 2 shown in FIG. 3 (that is, a solar cell module in which the lead wires 62 and 63 are coated on both sides). Further, FIG. 17 shows only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The difference between this specific example 12 and the above specific example 11 is that in the above specific example 11, only the lower covering insulating film 61b of the lead wire 63 is formed to have a width slightly larger than the width of the opening 65a of the back film 65. In this specific example 12, the upper covering insulating film 61a is also formed to have a width that is slightly wider than the width of the opening 65a of the back film 65, and exceeds the edge 65a1 on one side of the opening 65a. It is provided to extend until it enters. Accordingly, the edge portion of the opening 65a of the back film 65 can be covered over the entire circumference by the extending portion 61b1 of the lower covering insulating film 61b, and the back film can be covered by the extending portion 61a1 of the upper covering insulating film 61a. The edge 65a1 on one side of the 65 openings 65a can be further covered.

[Specific Example 13]
18A and 18B are plan views of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of this specific example 13 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 18 is applied to the solar cell module of the configuration example 2 shown in FIG. 4 (that is, the single-sided solar cell module in which the lead wires 62 and 63 are coated only on the side close to the back electrode of the solar cell 55). Shows the case. In FIG. 18, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The present specific example 13 is a modification of the specific example 11. In this specific example 13, since the lead wire 63 is a single-sided coating in which only the side close to the back electrode of the solar battery cell 55 is covered, between this lead wire 63 and the back film 65, as in the above specific example 1. A strip-shaped insulating sheet 11h is arranged.

  That is, the lower covering insulating film 61b of the lead wire 63 is formed to have a width that is slightly wider than the width of the opening 65a of the back film 65 and extends beyond the edge 65a3 on the other side of the opening 65a. Arranged. Thereby, the edge part of the opening part 65a of the back film 65 can be covered over the perimeter by the extension part 61b1 of the lower side covering insulating film 61b. On the other hand, the strip-shaped insulating sheet 11h is disposed along the edge 65a1 on one side of the opening 65a crossed by the lead wire 63. The insulating sheet 11h is disposed between the lead wire 63 and the sealing insulating film (for example, EVA sheet) 64, and is an adhesive sheet having an adhesive applied to the lower surface. The insulating sheet 11h is formed wider than the width of the lower covering insulating film 61b. Then, when the insulating sheet 11h is disposed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lead wire 63 is fixed or temporarily fixed on the EVA sheet 59. It is like that. That is, the insulating sheet 11h serves to both insulate the edge 65a1 of the opening 65a and fix the lead wire 63. This prevents the insulating sheet 11h from shifting from the edge 65a1 of the opening 65a during subsequent laminating, and also serves to fix or temporarily fix the arrangement position of the lead wire 63 so as not to shift. Yes. That is, the lead wire 63 can be securely arranged and fixed at a position where it does not contact the end face of the opening 65a of the back film 65.

[Specific Example 14]
FIGS. 19A and 19B are plan views of the periphery of the opening showing the shape and arrangement of the insulating sheet of Example 14 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 19 is applied to the solar cell module of the configuration example 2 shown in FIG. 4 (that is, a single-sided solar cell module in which the lead wires 62 and 63 are coated only on the side close to the back electrode of the solar cell 55). Shows the case. In FIG. 19, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The present specific example 14 is a modification of the specific example 13 in which the strip-shaped insulating sheet 11i is made shorter than the insulating sheet 11h of the specific example 13.

  That is, the lower covering insulating film 61b of the lead wire 63 is formed to have a width that is slightly wider than the width of the opening 65a of the back film 65 and extends beyond the edge 65a3 on the other side of the opening 65a. Arranged. Thereby, the edge part of the opening part 65a of the back film 65 can be covered over the perimeter by the extension part 61b1 of the lower side covering insulating film 61b. On the other hand, the strip-shaped insulating sheet 11 i is arranged along the edge 65 a 1 on one side of the opening 65 a that the lead wire 63 crosses. The insulating sheet 11 i is disposed between the back film 65 and the sealing insulating film (for example, EVA sheet) 64. The insulating sheet 11i is formed to have a width that is slightly wider than the width of the opening 65a of the back film 65, and is slightly narrower than the width of the lower covering insulating film 61b. When the insulating sheet 11i is disposed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lower surface of the edge 65a1 on one side of the opening 65a of the back film 65 It is fixed or temporarily fixed with an adhesive. This prevents the insulating sheet 11i from shifting from the edge 65a1 of the opening 65a during the subsequent laminating process.

[Specific Example 15]
FIGS. 20A and 20B are plan views of the periphery of the opening showing the shape and arrangement of the insulating sheet of Example 15 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 20 shows a case where the lead wires 62 and 63 are applied to a non-insulated lead wire that is not covered at all. In FIG. 20, only one opening 65a and one opening 65a from which the output lead 63a of one lead wire 63 is led out are illustrated, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  In this specific example 15, an insulating layer (insulating film) 68 for covering the lower side of the lead wire 63 is provided on the back electrode film of the solar battery cell 55. The insulating layer 68 is formed so as to be slightly wider than the width of the opening 65a of the back film 65, and is disposed along the lead wire 63 up to the edge 65a3 on the other side of the opening 65a. It is. Thereby, the edge part of the opening part 65a of the back film 65 can be covered with the insulating layer 68 over a perimeter.

  Further, in this specific example 15, since the lead wire 63 is in a non-insulated state (a bare state that is not covered at all), the edge of one side of the opening 65a that the lead wire 63 crosses the strip-shaped insulating sheet 11j. It is arranged along 65a1. The insulating sheet 11j is disposed between the lead wire 63 and the sealing insulating film (for example, EVA sheet) 64, and is an adhesive sheet having an adhesive applied to the lower surface. Then, when the insulating sheet 11j is disposed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lead wire 63 is fixed or temporarily fixed on the insulating layer 68. It is like that. That is, the insulating sheet 11j serves to both insulate the edge 65a1 of the opening 65a and fix the lead wire 63. This prevents the insulating sheet 11j from shifting from the edge 65a1 of the opening 65a during subsequent laminating, and also serves to fix or temporarily fix the arrangement position of the lead wire 63 so as not to shift. Yes. That is, the lead wire 63 can be securely arranged and fixed at a position where it does not contact the end face of the opening 65a of the back film 65.

[Specific Example 16]
FIGS. 21A and 21B are plan views of the periphery of the opening showing the shape and arrangement of the insulating sheet of this specific example 16 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 21 shows a case where the lead wires 62 and 63 are applied to a non-insulated lead wire that is not covered at all. In FIG. 21, only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out is shown, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The present specific example 16 is a modification of the specific example 15, and the width of the strip-shaped insulating sheet 11k is made shorter than the width of the insulating sheet 11j of the specific example 15 to cover only the portion of the lead wire 63. It is what I did. Also in the present specific example 16, the insulating sheet 11k is an adhesive sheet having an adhesive applied to the lower surface, and this insulating sheet 11k is formed along the edge 65a1 of the opening 65a of the back film 65 along the solar cell 55. The lead wire 63 is fixed or temporarily fixed on the insulating layer 68 when it is disposed on the back electrode film. The other configuration is the same as that of the specific example 5 shown in FIG.

[Specific Example 17]
22A and 22B are plan views of the periphery of the opening showing the shape and arrangement configuration of the insulating sheet of this specific example 17 (however, the back film 65 and the sealing insulating film 64 are not shown). .) And a cross-sectional view (more precisely, an end view). However, FIG. 22 shows a case where the present invention is applied to a non-insulated lead wire in which the lead wires 62 and 63 are not covered at all. Further, FIG. 22 shows only one opening 65a from which one opening 65a and the output lead 63a of one lead wire 63 are led out, but the other from which the other output lead 62a is led out. The opening 65a has the same structure.

  The present specific example 17 is a modification of the specific example 15 described above, in which a strip-shaped insulating sheet 11 m is disposed between the back film 65 and the sealing insulating film 64.

  That is, the insulating sheet 11m is arranged along the edge 65a1 on one side of the opening 65a that the lead wire 63 crosses. The insulating sheet 11m is disposed between the back film 65 and the sealing insulating film (for example, EVA sheet) 64. The insulating sheet 11 i is formed to have a width that is slightly wider than the width of the opening 65 a of the back film 65 and is slightly narrower than the width of the insulating layer 68. When the insulating sheet 11m is disposed on the back electrode film of the solar battery cell 55 along the edge 65a1 of the opening 65a of the back film 65, the lower surface of the edge 65a1 on one side of the opening 65a of the back film 65 It is fixed or temporarily fixed with an adhesive. This prevents the insulating sheet 11m from shifting from the edge 65a1 of the opening 65a during the subsequent laminating process.

  In addition, although each said example has demonstrated the case where one lead wire was derived | led-out from one opening part 65a of the back film 65, both lead wires 62 and 63 are derived | led-out from one opening part 65a. You may do it. In this case, for example, for the specific examples 2, 3, 5, and 7, the insulating sheet having the same shape can be applied. Moreover, about the specific examples 4 and 6, the other edge part of the insulating sheet 11e adhere | attached or stuck and fixed to the lower surface of one edge part of the opening part 65a of the back film 65 is shown, for example in FIG. The upper edge 65a2 or the lower edge 65a4 of 14 (a) can be applied as it is. That is, the other edge of the insulating sheet 11e that is bonded or attached and fixed to the lower surface of one edge of the opening 65a of the back film 65 may be any edge that does not intersect the lead wire. This can also be applied in the case of the specific examples 4 and 6.

11a to 11m Insulating sheet 51 Translucent insulating substrate 55 Solar cell 56 Solar cell string (thin film solar cell string)
57 P-type electrode terminal part 58 N-type electrode terminal part 59 EVA sheet 60a Positive electrode current collector part 60b Negative electrode current collector part 61 Insulating film (insulating film)
62 positive electrode lead wire 63 negative electrode lead wire 62a, 63a output lead part 64 sealing insulating film (sealing insulating member)
65 Back film (back side protection member)
64a, 65a opening

Claims (7)

On the back side conductive finest solar battery cell, derived a lead wire, a sheet-like sealing insulating member having an opening for deriving an output lead portion of the lead wire, the output lead portion of the lead wire A solar cell module in which a sheet-like back surface protection member having an opening for the purpose of being sequentially laminated,
Wherein between the back surface electrodes and the back surface protective member, the insulating sheet so as to cover the edge entire periphery of the opening of the back protective member is disposed,
The insulating sheet is sized to cover the entire opening of the back surface protection member, and is disposed between the back electrode and the lead wire, and one edge portion of the insulating sheet is the lead. It is arrange | positioned at the lower surface side of a line | wire, The other edge part is adhere | attached or stuck and fixed to the other edge part lower surface of the said opening part, The solar cell module characterized by the above-mentioned. The solar cell module according to claim 1,
  The solar cell module, wherein the lead wire is covered with an insulating member except for the output lead portion. On the back side conductive finest solar battery cell, derived a lead wire, a sheet-like sealing insulating member having an opening for deriving an output lead portion of the lead wire, the output lead portion of the lead wire A solar cell module in which a sheet-like back surface protection member having an opening for the purpose of being sequentially laminated,
Wherein between the back surface electrodes and the back surface protective member, the insulating sheet so as to cover the edge entire periphery of the opening of the back protective member is disposed,
The insulating sheet is formed in a size that covers the entire opening of the back surface protection member, and is disposed between the lead wire and the back surface protection member, and the lead wire is an end of the insulating sheet. After being folded in half so as to sandwich the portion, the solar cell module is led upward from the opening of the back surface protection member . The solar cell module according to claim 3, wherein
The solar cell module, wherein the lead wire is a lead wire in which a lower surface side is covered with an insulating film and an upper surface side is exposed. The solar cell module according to claim 3 or 4, wherein
The solar cell module, wherein the insulating sheet has one end portion different from the end portion sandwiched between the lead wires bonded or fixed to the lower surface of the edge portion of the opening. On the back electrode of the solar cell, a lead wire, a sheet-shaped sealing insulating member having an opening for leading out the output lead portion of the lead wire, and a lead wire for leading out the output lead portion A method for manufacturing a solar cell module in which a sheet-like back surface protection member having an opening is sequentially laminated,
An insulating sheet formed between the back electrode and the lead wire so as to cover the entire periphery of the opening of the back protection member so as to cover the entire opening. A step of arranging one edge of the sheet so as to overlap an end of the insulating film arranged on the lower surface side of the lead wire;
Bonding or pasting and fixing the other edge of the insulating sheet to the lower surface of the other edge of the opening; and
The manufacturing method of the solar cell module characterized by including. On the back electrode of the solar cell, a lead wire, a sheet-shaped sealing insulating member having an opening for leading out the output lead portion of the lead wire, and a lead wire for leading out the output lead portion A method for manufacturing a solar cell module in which a sheet-like back surface protection member having an opening is sequentially laminated,
Between the lead wire in a state where the lower surface side is covered with an insulating film and the upper surface side is exposed, and the back surface protection member, the entire periphery of the opening portion of the back surface protection member is covered so that the entire opening portion is covered. A step of arranging an insulating sheet formed in a covering size;
A step of leading the lead wire upward from the opening of the sealing insulating member and the opening of the back surface protection member after folding the lead wire in half so as to sandwich the end portion of the insulating sheet;
The manufacturing method of the solar cell module characterized by including.

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