Photovoltaic module

Abstract

The utility model provides a photovoltaic assembly, and belongs to the field of photovoltaic technology. The photovoltaic module comprises: a plurality of battery strings, each battery string comprising: a battery body having a battery edge extending in a second direction; the plurality of current collection electrodes are arranged on the surface of the battery body, are alternately arranged at intervals along a first direction with different polarities, and extend along a second direction vertical to the first direction; an electrical connection line extending in a first direction on the surface, the electrical connection line being electrically connected to the collector electrodes of the same polarity through the bonding portion; and a first insulator disposed on the surface of the battery body, between the collector electrode closest to the battery edge and the battery edge, and corresponding to the coupling portion in the first direction.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Technology

[0002] In back-contact photovoltaic modules, the interconnection of multiple cell strings is mostly achieved by conductive adhesive printing and solder ribbon welding. For example, conductive adhesive is printed onto the grid lines on the surface of the cell using a printing screen, and then solder ribbons are welded to conductive adhesive, such as gray adhesive, to form multiple cell bodies connected in series, thus preparing a photovoltaic module.

[0003] In order to collect more current, the positive or negative sub-grid is placed closer and closer to the edge of the battery, and the spacing between the battery strings is getting smaller and smaller. This makes it easy for the conductive adhesive to overflow when it is connected to the solder ribbon, and come into contact with the edge of the adjacent battery body, resulting in a short circuit between the battery bodies. Utility Model Content

[0004] In view of this, in order to at least partially solve at least one of the aforementioned technical problems, the present invention provides a photovoltaic module.

[0005] An embodiment of this utility model provides a photovoltaic module including multiple battery strings. Each battery string includes: a battery body having a battery edge extending along a second direction; multiple current collectors disposed on the surface of the battery body, the current collectors being alternately spaced along a first direction with different polarities and extending along a second direction perpendicular to the first direction; an electrical connection wire extending along the first direction on the surface, the electrical connection wire being electrically connected to the current collectors of the same polarity through a joint; and a first insulating member disposed on the surface of the battery body, located between the current collector closest to the battery edge and the battery edge, and corresponding to the joint in the first direction.

[0006] In some illustrative embodiments, the length of the first insulating member in the second direction is greater than the length of the joint in the second direction.

[0007] In some illustrative embodiments, a second insulating element is provided between the electrical connection line and the collector electrodes of different polarities; the absolute value of the difference between the thickness of the first insulating element and the thickness of the second insulating element is less than or equal to 15 μm.

[0008] In some illustrative embodiments, the current collector closest to the edge of the battery and the edge of the battery have a first gap along a first direction, the first gap being greater than the width of the first insulating member along the first direction; and the width of the first insulating member along the first direction is greater than one-third of the first gap.

[0009] In some illustrative embodiments, the portion of the first insulator closest to the battery edge has a second gap along a first direction with respect to the battery edge, the second gap being greater than or equal to 0.

[0010] In some illustrative embodiments, the length of the first insulator in the second direction is 3 to 5 times the length of the electrical connection wire in the second direction.

[0011] In some illustrative embodiments, the distance between the end of the electrical connection wire and the edge of the battery along the first direction is a third distance, which is smaller than the first distance.

[0012] In some illustrative embodiments, the photovoltaic module further includes: a bus electrode that is directly contacted and electrically connected to a collector electrode of the same polarity and electrically isolated from a collector electrode of a different polarity. The bus electrode is disposed on the side of the junction near the battery body and is electrically connected to an electrical connection line through the junction.

[0013] In some illustrative embodiments, the projection of the first insulating element onto the surface is formed by at least one of a straight line and an arc.

[0014] In some illustrative embodiments, the projection of the first insulating member includes a main body portion and extensions at both ends of the main body portion along a first direction, the extensions having ends closer to the joint than the main body portion.

[0015] In some illustrative embodiments, each extension of the first insulating member is straight, and the included angle between the extension lines of the two extensions is 60°-120°; or each extension of the first insulating member is an arc segment, and the included angle between the tangents at the ends of the two arc segments is 60°-120°.

[0016] In some illustrative embodiments, the included angle is 90°.

[0017] In some illustrative embodiments, the material of the first insulating element and / or the second insulating element is formed of insulating adhesive.

[0018] According to the photovoltaic module provided in the above embodiments of the present invention, by setting a first insulating element between the current collecting electrode closest to the edge of the battery and the edge of the battery, the short circuit problem caused by the overflow of the joint during the manufacturing process of the photovoltaic module and the connection with the side wall of the adjacent battery body can be suppressed, thereby ensuring the quality and safety of the photovoltaic module. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0020] Figure 1 A cross-sectional view of a photovoltaic module in the related technology is shown;

[0021] Figure 2 A partial top view of a photovoltaic module according to an illustrative embodiment of the present invention is shown;

[0022] Figure 3 A cross-sectional view of a photovoltaic module provided in an embodiment of the present invention is shown;

[0023] Figure 4 A partial cross-sectional view of a photovoltaic module provided in an embodiment of the present invention is shown;

[0024] Figure 5 A partial top view of a photovoltaic module provided in an embodiment of the present invention is shown;

[0025] Figure 6 This shows another partial top view of the photovoltaic module provided in an embodiment of the present invention; and

[0026] Figure 7 Another partial top view of the photovoltaic module provided in an embodiment of the present invention is shown.

[0027] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0028] 1. Battery body;

[0029] 2. Collector electrode;

[0030] 3. Electrical connection wires;

[0031] 4. Joint;

[0032] 5. The first insulating element; and

[0033] 6. Second insulating component. Detailed Implementation

[0034] The embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0036] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). When using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0037] In back-contact batteries, conductive adhesive (grey glue) is often printed onto the grid lines on the battery surface using a stencil. After drying and curing, solder ribbons are then welded to the conductive adhesive to form a battery string consisting of multiple batteries connected in series. As the secondary grids on the back of the battery get closer to the edge of the battery sidewall, and the spacing between multiple batteries becomes smaller, the gray glue at the secondary grids can easily overflow during battery string fabrication after connecting to the solder ribbons. This can cause the gray glue to come into contact with the sidewalls of adjacent batteries or even the gray glue on adjacent batteries, leading to short circuits. This can affect the power and quality of the battery string, and in severe cases, may even cause a fire.

[0038] Figure 1 A cross-sectional view of a photovoltaic module in the relevant technology is shown. (For example...) Figure 1 As shown, in the related technology of back-contact photovoltaic modules, the conductive adhesive near the edge of the cell is more likely to overflow after welding and come into contact with the side of the adjacent cell body, causing the cell body to short-circuit, thus affecting the quality and safety of the photovoltaic module.

[0039] In view of this, how to provide a photovoltaic module that is conducive to collecting current at the edge of the battery, effectively connects with the solder ribbon, and avoids short circuits has become an urgent technical problem to be solved.

[0040] Figure 2 A partial top view of a photovoltaic module provided according to an illustrative embodiment of the present invention is shown.

[0041] According to the photovoltaic module provided by this utility model, such as Figure 2As shown, the photovoltaic module of this utility model can be a traditional IBC photovoltaic module (a module composed of interdigitated back contact cells), or a TBC photovoltaic module (a module composed of TOPCon back contact cells), an HBC photovoltaic module (a module composed of heterojunction back contact cells), or a hybrid photovoltaic module (i.e., the PN passivation is made of different passivation materials, such as a combination of polycrystalline silicon passivation and amorphous / microcrystalline passivation).

[0042] The aforementioned photovoltaic module includes a cell body 1, which includes at least a substrate and a doped layer on the substrate, wherein the substrate has a rectangular or square structure.

[0043] The cell body 1 of the aforementioned IBC photovoltaic module includes a first doped semiconductor portion and a second doped semiconductor portion disposed alternately on a substrate along a first direction to form an interdigitated doped portion structure. One of the first doped semiconductor portion and the second doped semiconductor portion is n-type doped and the other is p-type doped, and electrode structures spaced apart from each other are respectively disposed on the first doped semiconductor portion and the second doped semiconductor portion.

[0044] The aforementioned TBC photovoltaic module's cell body 1 includes a tunneling oxide layer disposed on a substrate, and a first doped semiconductor portion and a second doped semiconductor portion formed by a doped polycrystalline silicon layer. The TOPCon structure formed by the stacked tunneling oxide layer and the doped polycrystalline silicon layer provides a higher carrier lifetime and lower surface recombination rate compared to IBC photovoltaic modules, thus improving the photoelectric conversion efficiency of the TBC photovoltaic module.

[0045] The aforementioned HBC photovoltaic module's cell body 1 includes an n-type doped layer and a p-type doped layer stacked on a substrate to form a heterojunction structure. The n-type doped layer includes, but is not limited to, microcrystalline silicon or amorphous silicon (to provide electrons), and the p-type doped layer can also be made of microcrystalline silicon or amorphous silicon (e.g., using boron as a dopant to provide holes). HBC photovoltaic modules help improve carrier lifetime and reduce surface recombination. Furthermore, a transparent conductive oxide layer (TCO) can be disposed between the surfaces of the n-type and p-type doped layers and the electrodes. This not only facilitates the collection of carriers in the doped region but also provides a certain degree of anti-reflection effect.

[0046] The cell body 1 of the aforementioned hybrid photovoltaic module can adopt a layer structure similar to that of an IBC cell or a TBC cell, and on this basis, a corresponding passivation layer structure can be configured, such as a combination of at least two of polycrystalline silicon passivation, amorphous silicon passivation, and microcrystalline silicon passivation.

[0047] Photovoltaic modules based on any of the above embodiments Figure 3 A cross-sectional view of a photovoltaic module provided in an embodiment of the present invention is shown. Figure 4A partial cross-sectional view of a photovoltaic module provided in an embodiment of the present invention is shown. Figures 2-4 As shown, each cell string in the aforementioned photovoltaic module also includes a surface disposed on the cell body 1 (such as the backlight surface of the cell body 1, i.e.) Figure 2 The surface shown is the viewing angle surface, and the corresponding other surface is the light-receiving surface. Multiple collector electrodes 2 are located on this surface. The collector electrodes 2 (also called fine grids, collector grid lines, sub-grids, etc., and each collector electrode 2 has different polarities to extract majority or minority carriers from different doped regions) along a first direction (e.g., ...). Figure 2 The vertical direction shown is alternately spaced, and along the second direction (such as...) Figure 2 Extending in the left-right direction (as shown). Electrical connection wire 3 is disposed on the surface and extends along the first direction (e.g., in the left-right direction). Figure 2 Extending in the vertical direction (as shown). The external electrical connection line 3, also called solder ribbon or interconnecting strip, is used to connect at least two back-contact batteries in series. The electrical connection line 3 is electrically connected to the current collector 2 of the same polarity. The bonding part 4 (e.g., solder, solder paste, for welding the sub-grid and solder ribbon; or conductive adhesive layer, such as conductive silver paste, conductive glue, etc., for conductive bonding between the sub-grid and solder ribbon) is provided between the current collector 2 of the same polarity and the electrical connection line 3 to ensure a good welding relationship between the current collector 2 of the same polarity and the electrical connection line 3. The first insulating member 5 is pre-fabricated on the surface of the battery body 1, located between the current collector 2 closest to the battery edge and the battery edge, and corresponds to the bonding part 4 in the first direction.

[0048] The back-contact photovoltaic module illustrated in this utility model can also be formed by assembling a series of cells without a main grid (i.e., OBB). Specifically, the current collector 2 on the surface of the cell body 1 is directly connected to the external electrical connection line 3 without passing through the main grid.

[0049] In this implementation, for example, when the battery body 1, printed with conductive adhesive, is being soldered, the conductive adhesive, affected by the high temperature of the soldering process, flows towards the area near the edge of the battery along the electrical connection lines 3 or other directions. A first insulating member 5, pre-positioned at a specific location, is used to block the conductive adhesive flowing towards the battery edge, preventing it from contacting the conductive structure of adjacent battery bodies 1. In subsequent encapsulation processes, such as during lamination, the first insulating member 5 prevents the conductive adhesive from flowing towards adjacent battery bodies 1, further reducing the risk of short circuits and improving the reliability of the photovoltaic module.

[0050] Figure 5 A partial top view of a photovoltaic module provided in an embodiment of the present invention is shown. Figure 5As shown, the length of the first insulating member 5 in the second direction is configured to be greater than the length of the joint 4 in the second direction as needed, to prevent the material used in the joint 4 from flowing to the adjacent battery, and further to prevent it from touching the adjacent battery body 1 and causing a short circuit, thereby enhancing the quality and operational safety of the photovoltaic module.

[0051] In one illustrative embodiment, such as Figure 4 As shown, a second insulating member 6 is provided between the electrical connection line 3 and the current collector 2 of different polarities to isolate the electrical connection line 3 from the current collector 2 of different polarities. The shape of the second insulating member 6 can be, for example, block-shaped or strip-shaped, and is not particularly limited here. The width of the second insulating member 6 (extending along the second direction) is configured to be greater than the width of the joint 4 to ensure electrical isolation between the joint 4 and the current collector 2 of different polarities. The second insulating member 6 can be made of inorganic materials, such as silicon oxide or silicon nitride, or organic materials, such as insulating adhesive. The absolute value of the difference between the thickness of the first insulating member 5 (perpendicular to the direction of the battery body 1) and the thickness of the second insulating member 6 is less than or equal to 15 μm. Here, 15 μm can be understood as the accuracy error that may be introduced during the printing process. Preferably, the thickness of the first insulating member 5 is the same as the thickness of the second insulating member 6. When the absolute value of the thickness difference between the two is greater than the above range, a height difference will appear between the welding points. The electrical connection line 3 at the adjacent position will be arched due to the stress after welding and cooling, which will affect the electrical connection effect near the second insulating part 6, and may cause poor contact or short circuit risk, affecting the reliability of the photovoltaic module.

[0052] Among them, multiple second insulating elements 6 are discretely distributed on the current collector electrodes 2 of different polarities.

[0053] In one illustrative embodiment, taking an n-type silicon substrate as an example, the first polarity current collector 2 is disposed on the n-type doped region, and the second polarity current collector 2 is disposed on the p-type doped region.

[0054] According to an embodiment of the present invention, the current collector 2 closest to the edge of the battery and the edge of the battery have a first distance W1 along the first direction. The first distance W1 is greater than the width W2 of the first insulating member 5 along the first direction, and the width W2 of the first insulating member 5 along the first direction is greater than one-third of the first distance W1. Setting the width of the first insulating member 5 within the above range helps to form an effective blockage of the joint 4, avoid short circuits, and improve the reliability of the electrical connection.

[0055] According to an embodiment of this utility model, the portion of the first insulating member 5 closest to the battery edge has a second distance W3 along a first direction with respect to the battery edge, and the second distance W3 is greater than or equal to 0. Figure 5As shown, based on the structural characteristics of the back-contact battery, the portion closer to the edge of the battery body 1 is more susceptible to stress, leading to microcracks or cracks. Therefore, in the above embodiment, a predetermined second distance W3 is maintained between the portion of the first insulating member 5 closest to the battery edge and the battery edge. This prevents the relatively hard material of the first insulating member 5 from forming stress concentration points under pressure, thereby avoiding microcracks or cracks in the battery body 1 and ensuring the quality of the photovoltaic module.

[0056] According to an embodiment of this utility model, the length L1 of the first insulating member 5 in the second direction is 3 to 5 times the length L2 of the electrical connecting wire 3 in the second direction. This is because when the electrical connecting wire 3 is laid, it may be affected by the accuracy of the equipment and the offset during the lamination process, and it cannot be completely and accurately aligned with the first insulating member 5. Therefore, a preset length of offset space needs to be reserved. It should be noted that if L1 < 3L2, it may cause the electrical connecting wire 3 to deviate from the area of ​​the first insulating member 5, resulting in a short circuit in the battery string and affecting the operation of the device; if L1 > 5L2, it will lead to an increase in the material consumption of the first insulating member 5, thus increasing the cost.

[0057] According to an embodiment of the present invention, the distance between the end of the electrical connection line 3 and the edge of the battery along the first direction is a third distance W4. The third distance W4 is smaller than the first distance W1. It can be understood that the end of the electrical connection line 3 needs to be set on the side closer to the edge of the battery than the current collector electrode 2, so that the electrical connection line 3 can collect the edge current of the battery body 1 more fully.

[0058] In one illustrative embodiment, the third spacing W4 is greater than or equal to 0, allowing the electrical connection line 3 to adequately collect the edge current of the battery body 1. Due to the influence of printing process precision, the third spacing W4 between the end of the electrical connection line 3 and the edge of the battery can be adjusted to 5-10 mm as needed.

[0059] According to an embodiment of this utility model, the photovoltaic module further includes: a busbar electrode, which is directly contacted and electrically connected to the current collector electrode 2 of the same polarity, and electrically isolated from the current collector electrode 2 of different polarities. The busbar electrode can be regarded as the main grid structure connecting the current collector electrode 2. The busbar electrode is pre-positioned at a specific location on the battery body 1. During the welding process of the busbar electrode to the electrical connection line 3, the electrical connection line 3 has a bonding portion 4. The bonding portion 4 melts and joins with the busbar electrode and dissolves to form an intermetallic compound (i.e., IMC). It can be understood that the busbar electrode is disposed on the side of the bonding portion closer to the battery body 1, and is electrically connected to the electrical connection line 3 through the bonding portion 4.

[0060] In one illustrative embodiment, the material of the bus electrode includes, but is not limited to, silver, copper, and silver-plated copper.

[0061] According to an embodiment of the present invention, the projection of the first insulating member 5 on the surface is formed by at least one of straight lines and arcs, such as an arch, rectangle, trapezoid, hexagon, ellipse, semicircle, etc., to form an effective blockage of the joint 4.

[0062] In one illustrative embodiment, when conductive adhesive is used in the joint 4, in order to effectively prevent the conductive adhesive from overflowing along the electrical connection line 3 during interconnection and lamination, the projection of the first insulating member 5 on the surface can be set to a dam-like shape as needed. This provides space for the conductive adhesive to overflow and forms a surrounding structure for the conductive adhesive, thus more effectively preventing the conductive adhesive from overflowing.

[0063] Figure 6 This shows another partial top view of the photovoltaic module provided in an embodiment of the present invention. Figure 6 As shown, the projection of the first insulating member 5 includes a main body portion and extensions at both ends of the main body portion along a first direction, the extensions having ends closer to the junction 4 than the main body portion. This curved and encircling design forms an enclosure around the junction 4, providing better prevention of spillage from the junction 4, further reducing the risk of short circuits and improving the reliability of the connection between battery strings. Each extension of the first insulating member 5 is straight, and the included angle between the extension lines of two extensions is 60° to 120°, for example, 60°, 80°, 100°, or 120°.

[0064] Figure 7 Another partial top view of the photovoltaic module provided in an embodiment of the present invention is shown. Figure 7 As shown, each extension of the first insulating member 5 is an arc segment, and the included angle between the tangents at the ends of the two arc segments is 60° to 120°, for example, it can be 60°, 80°, 100° or 120°.

[0065] By forming an angle within the aforementioned range to surround the joint 4, the overflow of the joint 4 can be better prevented, further reducing the risk of short circuit and improving the reliability of the connection between battery strings.

[0066] Preferably, the included angle is 90°. When a 90° included angle is formed, the surrounding structure of the extension to the joint 4 is more complete, preventing the joint 4 from overflowing.

[0067] According to embodiments of this utility model, the materials of the first insulating member 5 and / or the second insulating member 6 are respectively formed of insulating adhesive. It is understood that insulating adhesive has good electrical insulation properties and, after curing, can form a relatively rigid structure, increasing the bonding force between components and providing mechanical support. Furthermore, the insulating adhesive is mostly liquid or semi-solid before curing, making it relatively easy to form different geometric shapes, which helps to form a surrounding structure around the joint 4, achieving a better effect of preventing conductive adhesive from overflowing.

[0068] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic module, characterized by, The battery includes a plurality of battery strings, at least one of the battery strings including: a battery body having a battery edge extending in a second direction; a plurality of current collecting electrodes disposed on a surface of the battery body, the current collecting electrodes being alternately spaced apart in a first direction with different polarities and extending in a second direction perpendicular to the first direction; an electric connection line extending in the first direction on the surface, the electric connection line being electrically connected to the current collecting electrode with the same polarity through a junction portion; and a first insulating member disposed on the surface of the battery body between the current collecting electrode closest to the battery edge and the battery edge and corresponding to the junction portion in the first direction.

2. The photovoltaic module of claim 1, wherein, A length of the first insulating member in the second direction is greater than a length of the junction portion in the second direction.

3. The photovoltaic module of claim 1, wherein, A second insulating member is disposed between the electric connection line and the current collecting electrode with the different polarity; An absolute value of a difference between a thickness of the first insulating member and a thickness of the second insulating member is less than or equal to 15 μm.

4. The photovoltaic module of claim 1, wherein, The current collecting electrode closest to the battery edge and the battery edge have a first interval in the first direction, the first interval being greater than a width of the first insulating member in the first direction; and the width of the first insulating member in the first direction is greater than one third of the first interval.

5. The photovoltaic module according to one of claims 1 to 4, characterized in that A portion of the first insulating member closest to the battery edge and the battery edge have a second interval in the first direction, the second interval being greater than or equal to 0.

6. The photovoltaic module according to one of claims 1 to 4, characterized in that A length of the first insulating member in the second direction is 3 to 5 times a length of the electric connection line in the second direction.

7. The photovoltaic module of claim 4, wherein, An interval between an end of the electric connection line and the battery edge in the first direction is a third interval, the third interval being less than the first interval.

8. The photovoltaic module according to one of claims 1 to 4, characterized in that Further comprising: a bus electrode directly contacting and electrically connected to the current collecting electrode with the same polarity and electrically isolated from the current collecting electrode with the different polarity, the bus electrode being disposed on a side of the junction portion close to the battery body and electrically connected to the electric connection line through the junction portion.

9. The photovoltaic module according to one of claims 1 to 4, characterized in that A projection of the first insulating member on the surface is surrounded by at least one of a straight line and an arc.

10. The photovoltaic module of claim 9, wherein, The projection of the first insulating member includes a main portion and extensions at both ends of the main portion in the first direction, the extensions having end portions closer to the junction portion than the main portion.

11. The photovoltaic module of claim 10, wherein, Each of the extensions of the first insulating member is linear, and an included angle between extension lines of the two extensions is 60° to 120°, or Each of the extensions of the first insulating member is an arc segment, and an included angle between tangent lines at end portions of the two arc segments is 60° to 120°.

12. The photovoltaic module of claim 11, wherein, The included angle is 90°.

13. The photovoltaic module of claim 3, wherein, The first insulating member and / or the second insulating member is formed of an insulating adhesive.

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