Integrated power generation panel and production method thereof

Abstract

The invention belongs to the technical field of photovoltaic power generation, and provides an integrated power generation panel and a production method thereof.The integrated power generation panel comprises a plurality of power generation panels, and each power generation panel is of a stacked structure; the laminated structure comprises a front plate, a first packaging adhesive film, a battery string, a second packaging adhesive film, an insulating layer, a third packaging adhesive film and a rear plate which are laminated in sequence; bending parts are arranged on the two sides of the rear plate; when the power generation panels are integrated, the adjacent power generation panels are in lap joint through the bending parts. According to the power generation panel, a color steel tile roof and a building wall surface are directly replaced by the rear plate, meanwhile, a corrugated structure is arranged, the power generation panel has the technical characteristics of being convenient and fast to install, safe and durable in structure, resistant to impact, waterproof, fireproof, beneficial to later maintenance and the like, and the panel is low in overall investment cost, short in recovery period, attractive in appearance, simple in process and capable of being industrially popularized.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and in particular relates to an integrated power generation panel and a production method thereof. Background Art

[0002] Photovoltaic power generation technology, as one of the important technologies in the ultra-low energy consumption and near-zero energy consumption technology system, can effectively reduce carbon emissions. Among them, "photovoltaic + building" is undoubtedly the largest market in future building energy conservation and green development, and provides new ideas for the application of green energy in architectural design. In recent years, many manufacturers have launched assembled BIPV component products that closely combine photovoltaic components with building materials such as color steel tiles. Take a company's long top product as an example. The product uses crystalline silicon cells and a double-sided 2.0mm glass packaging structure. The components are bonded to the color steel tiles using structural adhesive to form a whole. Building materials such as insulation cotton and waterproof membrane layers can be laid under the color steel tiles. The Tiannengwa series products of a company draw on the mortise and tenon structure of traditional buildings, and use clamps such as pressure blocks and sliders to combine special frames with customized special color steel tiles to form assembled BIPV component products that closely combine photovoltaic components with color steel tiles. The installation of such products is highly destructive to buildings, difficult to construct, and has high maintenance costs, and the overall installation cost is high. At the same time, such products are heavy and are not suitable for low-load roofs. They are non-building materials, and product promotion is restricted. Summary of the invention

[0003] In order to solve the problems in the background technology, the present invention provides an integrated power generation panel and a production method thereof.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An integrated power generation panel, comprising a plurality of power generation panels, each of which is a stacked structure, wherein the stacked structure comprises a front plate, a first packaging film, a battery string, a second packaging film, an insulating layer, a third packaging film and a rear plate stacked in sequence;

[0006] The rear plate is provided with bending parts on both sides;

[0007] When the plurality of power generation panels are integrated, adjacent power generation panels are overlapped via the bending portions.

[0008] Preferably, the front plate is a light-transmitting anti-glare glass with a thickness of 1.1 to 1.6 mm;

[0009] The mirror reflection of the front plate changes to diffuse reflection, the surface roughness is greater than 2.4um, and the light transmittance is greater than or equal to 93.8%.

[0010] Preferably, the first packaging film is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral, with a gram weight of 330 g / m2 ~390g / m 2 The transmittance in the 400nm~1100nm band is above 90%.

[0011] Preferably, the battery string is a fork-shaped back-junction back-contact battery string, and is welded using a 0.6 mm×0.16 mm flat welding strip and a back-contact straight-line lap welding technology.

[0012] Preferably, the second packaging film is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral;

[0013] The weight of the second packaging film is 430 g / m 2 ~550g / m 2 .

[0014] Preferably, the insulating layer is a bonded heat-resistant polyester film, which is prepared by melt-extruding polyethylene terephthalate into a sheet and biaxially oriented stretching;

[0015] The thickness of the insulating layer is 0.15 mm to 0.25 mm, the power frequency electrical strength is above 60 V / μm, and the insulation voltage is greater than 1500 V.

[0016] Preferably, the third packaging film is one or more of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral;

[0017] The third packaging film has a gram weight of 330 g / m 2 ~430g / m 2 .

[0018] Preferably, the back plate comprises a substrate and a coating plated on the substrate, with a width of 600 to 1600 mm and a thickness of 0.4 to 0.8 mm;

[0019] The weight of the coating on the front side of the substrate is ≥75g / m 2 The weight of the back coating of the substrate is ≥75g / m 2 .

[0020] Preferably, the rear plate is composed of a substrate, a plating layer and a coating layer;

[0021] The coating is on the surface of the substrate;

[0022] The coating is on the surface of the plated layer.

[0023] Preferably, the substrate is made of hot-dip galvanized steel sheet with a yield strength of ≥350 MPa and a tensile strength of ≥420 MPa.

[0024] Preferably, the coating is a high aluminum-zinc-aluminum-magnesium alloy coating or an aluminum-zinc alloy coating;

[0025] The mass percentage of the components of the high aluminum-zinc-aluminum-magnesium alloy coating is 55% aluminum, 2% magnesium, 1.6% silicon and 41.4% zinc; the mass percentage of the components of the aluminum-zinc alloy coating is 55% aluminum, 1.5% silicon and 43.5% zinc.

[0026] Preferably, the primer of the coating can be one or more of epoxy resin, polyester, acrylic resin, and polyurethane, and the topcoat of the coating material can be one or more of polyester, silicon-modified polyester, high weather-resistant polyester, and polyvinylidene fluoride; the thickness of the coating on the upper surface of the substrate is ≥20um, and the thickness on the lower surface is 5 to 15um.

[0027] Preferably, the bending portion comprises:

[0028] A first corrugated bending portion, a first overlapping portion and a retaining edge which are sequentially connected from the inside to the outside and are located on one side of the base plate;

[0029] A second corrugated bending portion and a second overlapping portion located on the other side of the base plate and connected sequentially from the inside to the outside;

[0030] When adjacent base plates are overlapped, the first overlapping portion overlaps the second overlapping portion, and the retaining edge is embedded from the bottom opening of the second corrugated bending portion.

[0031] A method for producing an integrated power generation panel, used for the above-mentioned integrated power generation panel, comprises the following steps:

[0032] According to the stacking structure of the power generation panel, the front plate and the first packaging film are laid in sequence;

[0033] Arrange the battery strings and lay them on the first packaging film;

[0034] According to the stacking structure of the power generation panel, the second packaging film, the insulating layer, the third packaging film and the back plate are laid in sequence;

[0035] Turning over the laid power generation panel, laminating it, and bending both sides of the rear panel to form a bent portion;

[0036] Turn over the power generation panel again and connect it to the junction box.

[0037] Preferably, the layout of the battery string includes the following steps:

[0038] Cutting the battery cells of the battery string, with a cutting depth of 35% to 40% of the thickness of the battery cells, a cutting line width of ≤25 μm, a uniformity of ≤10%, and a heat-affected zone of ≤80 μm;

[0039] In the horizontal direction, the positive poles are connected in parallel with the same battery string, and the negative poles are connected in parallel with the same battery string;

[0040] The positive electrodes are connected to the positive busbars of the battery strings connected in parallel in the same manner, and the negative electrodes are connected to the negative busbars of the battery strings connected in parallel in the same manner.

[0041] Beneficial effects of the present invention:

[0042] 1. The power generation panel of the present invention directly replaces the color steel tile roof and building wall through the back plate, and at the same time sets a corrugated structure, which has the technical characteristics of convenient installation, safe and durable structure, impact resistance, waterproof, fireproof and conducive to later maintenance. The overall investment cost of the panel of the invention is small, the recovery period is short, the appearance is beautiful, the process is simple, and it can be industrialized and promoted;

[0043] 2. The present invention adopts 0.6mm×0.16mm flat welding strip and back contact straight-line lap welding technology for battery string welding. Compared with the traditional Z-shaped welding of crystalline silicon cells, the welding area between the welding strip and the battery main grid line is increased, the welding tension is improved, and the risks of false welding and hidden cracks during component operation are reduced;

[0044] 3. The present invention adopts thin and light high-transmittance anti-glare glass to reduce building light pollution. Secondly, since it is equipped with BC battery technology and has no grid lines on the front, it can be perfectly combined with the building to meet the architectural aesthetic requirements. At the same time, compared with products that are closely combined with photovoltaic components and color steel tiles and other building materials, it is lighter, only 70% of the current technology used, and has low requirements for roof loads.

[0045] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 An exploded schematic diagram of an integrated power generation panel of the present invention is shown;

[0048] Figure 2a An assembly diagram of an integrated power generation panel of the present invention is shown;

[0049] Figure 2b Shows Figure 2a Schematic diagram of the bending part at position A in the middle;

[0050] Figure 2c Shows Figure 2a Schematic diagram of the bending part at position B in the middle;

[0051] Figure 3 A flow chart of a method for producing an integrated power generation panel is shown;

[0052] Figure 4 The circuit diagram of the battery string after layout of the present invention is shown.

[0053] In the figure: 1, front plate; 2, first packaging film; 3, battery string; 4, second packaging film; 5, insulation layer; 6, third packaging film; 7, back plate; 701, first corrugated bending part; 702, first overlapping part; 703, retaining edge; 704, second corrugated bending part; 705, second overlapping part. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] An integrated power generation panel, such as Figure 1 As shown, it includes several power generation panels, each of which is a stacked structure, and the stacked structure includes a front plate 1, a first packaging film 2, a battery string 3, a second packaging film 4, an insulating layer 5, a third packaging film 6 and a rear plate 7 stacked in sequence.

[0057] like Figure 2a-2c As shown, the two sides (A and B) of the rear plate 7 are provided with bending parts. When a plurality of power generation panels are integrated, the adjacent power generation panels are overlapped by the bending parts. Figure 2a In the figure, the first corrugated bending portion 701, the first overlapping portion 702 and the retaining edge 703 are sequentially connected from the inside to the outside on the left side of the base plate 7, wherein the first overlapping portion 702 is a horizontal plate. Figure 2c In the figure, the right side of the base plate 7 is connected with the second corrugated bending part 704 and the second overlapping part 705 from the inside to the outside, wherein the second overlapping part 705 is a horizontal plate. When two adjacent base plates 7 are overlapped, the first overlapping part 702 overlaps the second overlapping part 705, and the retaining edge 703 is embedded from the bottom opening of the second corrugated bending part 704.

[0058] The power generation panel can directly replace the color steel tile roof and building wall through the rear plate 7. At the same time, it has the technical characteristics of convenient installation, safe and durable structure, impact resistance, waterproof, fireproof and convenient later maintenance. The overall investment cost is small, the recovery period is short, the appearance is beautiful, the process is simple, and it can be industrialized and promoted.

[0059] It should be noted that when the power generation panels are installed, the left and right corrugations of adjacent power generation panels are overlapped in sequence and can be used as building roof panels and wall panels. The bending structure shown in the figure is only an example. This embodiment is not limited to the protection of such structures, but should include the application of back-based photovoltaic building materials component technology in photovoltaic buildings.

[0060] Among them, the front panel 1 is an ultra-thin high-transmittance anti-glare glass with a thickness of 1.1 to 1.6 mm. Through a special chemical etching process (fluoride + auxiliary additives), the mirror reflection can be converted into diffuse reflection, which greatly reduces the reflection effect. The surface roughness is >2.4um and the transmittance is ≥93.8%.

[0061] The first packaging film 2 is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral, with a gram weight of 330 g / m 2 ~390g / m 2 The use of low-weight film further reduces production costs, and the light transmittance in the 400nm~1100nm band is above 90%.

[0062] Among them, the battery string 3 is made of fork-shaped back-junction back-contact (BC, full name Back Contact) battery string welding, and uses 0.6mm×0.16mm flat welding ribbon and back contact straight-line lap welding technology for battery string welding. Compared with the traditional crystalline silicon battery Z-shaped welding, the welding area between the welding ribbon and the battery main grid line is increased, the welding tension is improved, and the risks of cold welding and hidden cracks during component operation are reduced.

[0063] The second packaging film 4 is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral. Since the grid lines of BC batteries are all on the back, the weight of the second packaging film 4 is 430g / m 2 ~550g / m 2 , increase cushioning and avoid hidden cracks during lamination.

[0064] Exemplarily, the insulating layer 5 is a high-bonding, moisture- and heat-resistant polyester film, which is made of polyethylene terephthalate raw material by melt extrusion casting and biaxial oriented stretching, with a thickness of 0.15 mm to 0.25 mm, an industrial frequency electrical strength of more than 60 V / μm, and an insulation performance far greater than the conventional system voltage of 1500 V.

[0065] The third packaging film 6 is one or more of ethylene-vinyl acetate copolymer (EVA), expandable polyethylene (EPE), polyethylene oxide (POE), and polyvinyl butyral (PVB). In addition, the third packaging film 6 has a weight of 330 g / m 2 ~430g / m 2 , preferably 390g / m 2 , mainly its bonding effect.

[0066] The back plate 7 includes a substrate and a coating on the substrate, with a width of 600-1600 mm and a thickness of 0.4-0.8 mm. The coating on the front of the substrate has a gram weight of ≥75 g / m 2 , the weight of the coating on the back of the substrate is ≥75g / m 2 . Preferably, the back plate 7 can be composed of a substrate, a plating layer and a coating layer, wherein the plating layer is on the surface of the substrate and the coating layer is on the surface of the plating layer. The material of the substrate 7 is S350GD (hot-dip galvanized steel plate), the yield strength requirement is ≥350MPa, and the tensile strength requirement is ≥420MPa. The plating layer is a high aluminum-zinc-aluminum-magnesium alloy plating layer or an aluminum-zinc-plated alloy plating layer; wherein the mass percentage of the high aluminum-zinc-aluminum-magnesium alloy plating layer is 55% aluminum, 2% magnesium, 1.6% silicon and 41.4% zinc; the mass percentage of the aluminum-zinc-plated alloy plating layer is 55% aluminum, 1.5% silicon, and 43.5% zinc. The primer of the coating material can be epoxy resin, polyester, acrylic resin, polyurethane, and the topcoat of the coating material can be polyester, silicon-modified polyester, high weather-resistant polyester, polyvinylidene fluoride, and the coating thickness is ≥20um on the upper surface and 5 to 15um on the lower surface.

[0067] Example 2

[0068] A crystalline silicon cell is used to replace the back contact cell in Example 1, and a Z-shaped welding technique is used to replace the back contact straight-line lap welding in Example 1. Please note that the specific operation steps, material selection, and preparation conditions of this example are not described in detail, but can be understood and implemented with reference to the relevant contents in Example 1. No further details will be given here.

[0069] After comparing Example 2 with Example 1: conventional crystalline silicon cells have grid lines on both the front and back sides, and the use of Z-shaped welding technology affects the overall aesthetics of the building. At the same time, the risk of hidden cracks during lamination is relatively high, and the yield rate is low.

[0070] Example 3

[0071] The insulating layer 5 in Example 1 is removed, and the stacked structure of this embodiment sequentially stacks the front plate 1, the first packaging film 2, the battery string 3, the second packaging film 4, the third packaging film 6 and the back plate 7. Among them, the structural parameters of each layer are consistent with those of Example 1. Please note that the specific operating steps, material selection and preparation conditions of this embodiment are not described in detail, but can be understood and implemented with reference to the relevant contents in Example 1. No further details will be given here.

[0072] After comparing Example 3 with Example 1: Since the inside of the battery is a charged body under light conditions, if the insulating layer 5 is not added, the inside of the battery and the back plate 7 will be connected, and the risk of leakage is high.

[0073] Example 4

[0074] The power generation panel of this embodiment adopts a double-sided 2.0 mm glass packaging structure, and the components are bonded to the color steel tiles using structural adhesive to form a whole, and thermal insulation cotton and waterproof film layers are laid under the color steel tiles.

[0075] After comparing Example 4 with Example 1: For users, the investment cost is equivalent to the price of color steel tiles + double-sided components, and the overall cost is high. At the same time, the packaging structure weight of double-sided 2.0mm glass is about 30kg, which is not suitable for low-load roofs and non-building materials, and the product promotion is limited.

[0076] The present invention uses thin, light, highly transparent anti-glare glass to reduce building light pollution. Secondly, because it is equipped with BC-type battery technology, there is no grid line on the front, which can be perfectly combined with the building to meet the architectural aesthetic requirements. At the same time, compared with the assembled BIPV (photovoltaic integration, Building Integrated Photovoltaic) component products that are closely combined with photovoltaic components and color steel tiles and other building materials, it is lighter, only 70% of the current technology used. This product has low requirements for roof loads and has technical characteristics such as easy installation, safe and durable structure, impact resistance, waterproof, fireproof and easy later maintenance. The module that truly integrates architecture and power generation has a service life of up to 20 years.

[0077] Example 5

[0078] A method for producing an integrated power generation panel, for an integrated power generation panel of embodiment 1, such as Figure 3 As shown, the following steps are included:

[0079] S1: According to the stacking structure of the power generation panel, the front plate 1 and the first packaging film 2 are laid in sequence.

[0080] S2: Laying out the battery string 3 and laying it on the first packaging film 2, specifically including:

[0081] S201: cutting the battery cells of battery string 3, with a cutting depth of 35% to 40% of the thickness of the battery cells, a cutting line width ≤ 25 μm, a uniformity ≤ 10%, and a heat-affected zone ≤ 80 μm, to further reduce the impact of laser cutting on the power and performance of the battery cells.

[0082] S202: Along the horizontal direction, the battery strings 3 with the positive poles facing the same direction are connected in parallel, and the battery strings 3 with the negative poles facing the same direction are connected in parallel.

[0083] S203: The positive electrodes are connected to the positive busbars facing the same parallel battery string 3, and the negative electrodes are connected to the negative busbars facing the same parallel battery string 3.

[0084] S204 : Laying the laid-out battery string 3 on the first packaging film 2 .

[0085] S3: according to the stacked structure of the power generation panel, the second packaging film 4, the insulating layer 5, the third packaging film 6 and the rear plate 7 are laid in sequence.

[0086] S4: Turn over the laid power generation panel, perform lamination, and bend both sides of the rear plate 7 to form a bent portion.

[0087] S5: Turn over the power generation panel again and connect it to the junction box.

[0088] It should be noted that compared with the conventional photovoltaic module production process, the above S1-S5 adds 5 steps, including laying the insulating layer 5, laying the back plate 7, turning the photovoltaic module (power generation panel) to face the front side upward, pressing and bending the back plate 7, and turning the photovoltaic module (power generation panel) to face the back side upward. These 5 steps are the key process steps for forming the power generation panel.

[0089] like Figure 4 As shown in FIG. 1 , the circuit of the battery string 3 is arranged after layout. It can be seen from the figure that a single battery string 3 is composed of a plurality of battery cells connected in series, and then the battery strings 3 can be arranged in parallel. Figure 4 In the figure, the positive electrodes of the three parallel battery strings 3 on the upper left are connected to the positive bus, the positive electrodes of the three parallel battery strings 3 on the lower left are connected to the positive bus, the negative electrodes of the three parallel battery strings 3 on the upper right are connected to the negative bus, and the negative electrodes of the three parallel battery strings 3 on the lower right are connected to the negative bus.

[0090] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated power generation panel, characterized in that: It comprises a plurality of power generation panels, each of which is a stacked structure, wherein the stacked structure comprises a front plate (1), a first packaging film (2), a battery string (3), a second packaging film (4), an insulating layer (5), a third packaging film (6) and a rear plate (7) which are stacked in sequence; The rear plate (7) is provided with bending parts on both sides; When the plurality of power generation panels are integrated, adjacent power generation panels are overlapped via the bending portions.

2. The integrated power generation panel according to claim 1, characterized in that: The front plate (1) is a light-transmitting anti-glare glass with a thickness of 1.1 to 1.6 mm; The mirror reflection of the front plate (1) changes to diffuse reflection, the surface roughness is greater than 2.4 um, and the light transmittance is greater than or equal to 93.8%.

3. The integrated power generation panel according to claim 1, characterized in that: The first packaging film (2) is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral, with a gram weight of 330 g / m 2 ~390g / m 2 The transmittance in the 400nm~1100nm band is above 90%.

4. The integrated power generation panel according to claim 1, characterized in that: The battery string (3) is a battery string (3) with fork-shaped back junctions and back contacts, and is welded using a 0.6 mm×0.16 mm flat welding strip and a back contact straight-line lap welding technology.

5. The integrated power generation panel according to claim 1, characterized in that: The second packaging film (4) is one or more combinations of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral; The second packaging film (4) has a gram weight of 430 g / m 2 ~550g / m 2 .

6. The integrated power generation panel according to claim 1, characterized in that: The insulating layer (5) is a bonded moisture-heat-resistant polyester film, which is made by melt-extruding polyethylene terephthalate into a sheet and biaxially oriented stretching; The thickness of the insulating layer (5) is 0.15 mm to 0.25 mm, the power frequency electrical strength is above 60 V / μm, and the insulation voltage is greater than 1500 V.

7. The integrated power generation panel according to claim 1, characterized in that: The third packaging film (6) is one or more of ethylene-vinyl acetate copolymer, polyethylene foam, polyethylene oxide, and polyvinyl butyral; The third packaging film (6) has a gram weight of 330 g / m 2 ~430g / m 2 .

8. The integrated power generation panel according to claim 1, characterized in that: The rear plate (7) comprises a substrate and a coating plated on the substrate, with a width of 600 to 1600 mm and a thickness of 0.4 to 0.8 mm; The weight of the coating on the front side of the substrate is ≥75g / m 2 The weight of the back coating of the substrate is ≥75g / m 2 .

9. The integrated power generation panel according to claim 8, characterized in that: The rear plate (7) is composed of a substrate, a plating layer and a coating layer; The coating is on the surface of the substrate; The coating is on the surface of the plated layer.

10. The integrated power generation panel according to claim 9, characterized in that: The substrate is made of hot-dip galvanized steel plate with a yield strength of ≥350MPa and a tensile strength of ≥420MPa.

11. The integrated power generation panel according to claim 9, characterized in that: The coating is a high aluminum-zinc-aluminum-magnesium alloy coating or an aluminum-zinc alloy coating; The mass percentage of the components of the high aluminum-zinc-aluminum-magnesium alloy coating is 55% aluminum, 2% magnesium, 1.6% silicon and 41.4% zinc; the mass percentage of the components of the aluminum-zinc alloy coating is 55% aluminum, 1.5% silicon and 43.5% zinc.

12. The integrated power generation panel according to claim 9, characterized in that: The primer of the coating can be one or more of epoxy resin, polyester, acrylic resin, and polyurethane, and the topcoat of the coating material can be one or more of polyester, silicon-modified polyester, high weather-resistant polyester, and polyvinylidene fluoride; the thickness of the coating on the upper surface of the substrate is ≥20um, and the thickness on the lower surface is 5 to 15um.

13. An integrated power generation panel according to any one of claims 1 to 12, characterized in that: The bending portion comprises: A first corrugated bending portion (701), a first overlapping portion (702) and a retaining edge (703) which are connected in sequence from the inside to the outside and are located on one side of the base plate (7); A second corrugated bending portion (704) and a second overlapping portion (705) which are connected in sequence from the inside to the outside and are located on the other side of the base plate (7); When adjacent base plates (7) are overlapped, the first overlapped portion (702) overlaps the second overlapped portion (705), and the retaining edge (703) is embedded from the bottom opening of the second corrugated bent portion (704).

14. A method for producing an integrated power generation panel, used for an integrated power generation panel according to any one of claims 1 to 13, characterized in that: The following steps are involved: According to the stacked structure of the power generation panel, a front plate (1) and a first packaging film (2) are laid in sequence; Arranging the battery strings (3) and laying them on the first packaging film (2); According to the stacked structure of the power generation panel, a second packaging film (4), an insulating layer (5), a third packaging film (6) and a rear plate (7) are sequentially laid; Turning over the laid power generation panel to perform lamination, and bending both sides of the rear plate (7) to form a bent portion; Turn over the power generation panel again and connect it to the junction box.

15. The method for producing an integrated power generation panel according to claim 14, characterized in that: The battery string (3) is laid out, comprising the following steps: The battery cells of the battery string (3) are cut, with a cutting depth of 35% to 40% of the thickness of the battery cells, a cutting line width of ≤25 μm, a uniformity of ≤10%, and a heat-affected zone of ≤80 μm; In the horizontal direction, the battery strings (3) with the positive electrodes facing the same direction are connected in parallel, and the battery strings (3) with the negative electrodes facing the same direction are connected in parallel; The positive electrodes are connected to the positive busbars facing the same parallel battery string (3), and the negative electrodes are connected to the negative busbars facing the same parallel battery string (3).

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