Photovoltaic module
By introducing an insulating layer into photovoltaic modules, the problem of insufficient creepage distance is solved, resulting in more efficient module area utilization and improved high-voltage resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINT NEW ENERGY TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-21
AI Technical Summary
In existing photovoltaic modules, the creepage distance between the solar cell and the substrate edge is small, resulting in the inability to fully utilize the module area.
An insulating layer is introduced into the photovoltaic module and distributed on the upper, side and lower edge areas of the cell layer to increase the creepage distance. It can be optionally bagged to cover the cell layer. The width of the insulating layer may be different or the same in different surface areas.
It increases the spacing between solar cells and the utilization rate of the module area, improves the utilization efficiency and high voltage resistance of photovoltaic modules, and reduces the manufacturing difficulty.
Smart Images
Figure CN224154566U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Technology
[0002] Photovoltaic modules are the core components of solar power generation systems. The solar cells in a photovoltaic module generate electricity through the photovoltaic effect. Multiple solar cells are connected in series to form a cell string, and busbars are connected to the cell string to collect the current generated by the cell string.
[0003] Currently, due to the limited arrangement of solar cells, the creepage distance between the conductors in the cell layer and the edge of the substrate is relatively small, which results in the photovoltaic module area not being fully utilized.
[0004] Therefore, how to solve the above-mentioned technical problems should be a key focus for those skilled in the art. Utility Model Content
[0005] The purpose of this application is to provide a photovoltaic module to improve the utilization efficiency of photovoltaic modules.
[0006] To address the aforementioned technical problems, this application provides a photovoltaic module, comprising an insulating layer, a first substrate, a first encapsulating film layer, a cell layer, a second encapsulating film layer, and a second substrate, stacked sequentially from bottom to top.
[0007] The insulating layer is located between the first encapsulating film layer and the second encapsulating film layer. The insulating layer is distributed on the edge region of the upper surface, the side surface, and the edge region of the lower surface of the battery cell layer. The width of the area covered by the insulating layer on the upper surface of the battery cell layer is different from the width of the area covered by the insulating layer on the lower surface of the battery cell layer. Alternatively, the insulating layer is bag-shaped, and the entire battery cell layer is covered within the insulating layer.
[0008] Optionally, when the insulating layer is distributed on the edge region of the upper surface, the side surface, and the edge region of the lower surface of the battery cell layer, the shape of the insulating layer includes any one of C-shape, U-shape, Y-shape, and V-shape, and the opening of the insulating layer faces the battery cell layer.
[0009] Optionally, the insulating layer is located on opposite sides of the battery cell layer; or, the insulating layer surrounds the battery cell layer.
[0010] Optionally, when the insulating layer is located on opposite sides of the battery cell layer, the battery cell layer includes a plurality of battery strings and busbars, and the battery strings include a plurality of battery cells; the busbars are distributed on the first and second opposite sides of the battery cell layer, and the battery cells are distributed on the third and fourth opposite sides of the battery cell layer;
[0011] The insulating layer is distributed on the upper, side, and lower surfaces of the busbar on the first and second sides.
[0012] Optionally, when the insulating layer surrounds the battery cell layer, the battery cell layer includes a plurality of battery strings and busbars, and the battery strings include a plurality of battery cells; the busbars are distributed on the first and second opposing sides of the battery cell layer, and the battery cells are distributed on the third and fourth opposing sides of the battery cell layer;
[0013] The insulating layer is distributed on the upper, side, and lower surfaces of the busbar on the first and second sides;
[0014] The insulating layer is distributed on the upper, side, and lower surfaces of the battery cell on the third and fourth sides.
[0015] Optionally, when the insulating layer surrounds the battery cell layer, the battery cell layer includes a plurality of battery strings and a busbar, the battery strings include a plurality of battery cells, and the busbar is located on the side of the battery cell layer close to the first encapsulating film layer;
[0016] The insulating layer is distributed on the upper, side and lower surfaces of the battery cells around the battery cell layer.
[0017] Optionally, the width of the area covered by the insulating layer on the upper and / or lower surface of the battery cell layer is greater than 1 mm.
[0018] Optionally, the insulating layer includes a substrate layer and an adhesive layer, the adhesive layer being bonded to the battery cell layer, and the substrate layer being located on the surface of the adhesive layer away from the battery cell layer.
[0019] Optionally, the thickness of the substrate layer ranges from 0.05 mm to 0.5 mm; and / or, the thickness of the adhesive layer ranges from 0.01 mm to 0.5 mm.
[0020] Optionally, the insulating layer is an insulating coating.
[0021] Optionally, the distance between the periphery of the battery cell layer and the edge of the first substrate is greater than or equal to 6 mm.
[0022] Optionally, the battery strings in the battery cell layer include any one of multi-segment battery strings, half-cell battery strings, and whole-cell battery strings.
[0023] Optionally, when the battery string is a multi-segment battery string, the distance between adjacent battery segments in the battery string ranges from -1.5mm to 1.5mm.
[0024] Optionally, it also includes:
[0025] An anti-ultraviolet film layer and / or an ultraviolet cut-off film layer located on the surface of the insulating layer away from the battery cell layer.
[0026] Optionally, the thickness of the UV-resistant film layer ranges from 0.01 mm to 0.1 mm.
[0027] This application provides a photovoltaic module comprising an insulating layer, a first substrate, a first encapsulating film layer, a solar cell layer, a second encapsulating film layer, and a second substrate, stacked sequentially from bottom to top. The insulating layer is located between the first and second encapsulating film layers. The insulating layer is distributed on the edge regions of the upper surface, the sides, and the edge regions of the lower surface of the solar cell layer. The width of the area covered by the insulating layer on the upper surface of the solar cell layer is different from the width of the area covered by the insulating layer on the lower surface of the solar cell layer. Alternatively, the insulating layer is bag-shaped, and the solar cell layer is completely enclosed within the insulating layer.
[0028] As can be seen, in addition to the first substrate, the first encapsulating film layer, the cell layer, the second encapsulating film layer, and the second substrate, the photovoltaic module of this application also includes an insulating layer. This insulating layer is located at the upper edge region, the side edge region, and the lower edge region of the cell layer; or the insulating layer completely covers the cell layer. Therefore, the distance (i.e., creepage distance) between the conductor in the cell layer and the edges of the first and second substrates increases, and the increased creepage distance is equal to the width of the insulating layer located on the upper or lower surface of the cell layer. Because of the increased creepage distance in the photovoltaic module of this application, on the one hand, the cell spacing or cell size can be increased, thereby making fuller use of the photovoltaic module area and improving its utilization efficiency; on the other hand, it can increase the insulation of the photovoltaic module, improve its high-voltage resistance, and thus increase its power output. Furthermore, the width of the insulating layer located on the upper surface of the cell layer differs from the width of the insulating layer located on the lower surface of the cell layer, which reduces the difficulty of setting the insulating layer and improves the manufacturing efficiency of the photovoltaic module. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a top view of the cell layer and insulating layer in a photovoltaic module provided in an embodiment of this application. Figure 1 ;
[0031] Figure 2 This is a schematic cross-sectional view of a photovoltaic module provided in an embodiment of this application;
[0032] Figure 3 This is a top view of the cell layer and insulating layer in a photovoltaic module provided in an embodiment of this application. Figure 2 ;
[0033] Figure 4 This is a top view of the cell layer and insulating layer in a photovoltaic module provided in an embodiment of this application. Figure 3 ;
[0034] Figure 5 This is a top view of the cell layer and insulating layer in a photovoltaic module provided in an embodiment of this application. Figure 4 ;
[0035] Figure 6 This is a top view of the cell layer and insulating layer in a photovoltaic module provided in an embodiment of this application. Figure 5 ;
[0036] In the figure, 1 is the first substrate, 2 is the first encapsulation film layer, 3 is the battery cell layer, 31 is the battery cell, 32 is the busbar, 4 is the second encapsulation film layer, 5 is the second substrate, 6 is the insulating layer, and 7 is the frame. Detailed Implementation
[0037] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0039] As described in the background section, the creepage distance between the conductor in the cell layer and the edge of the substrate is currently relatively small, which results in the photovoltaic module area not being fully utilized.
[0040] In view of this, this application provides a photovoltaic module, please refer to... Figure 1 and Figure 3 It includes an insulating layer 6, a first substrate 1, a first encapsulating film layer 2, a battery cell layer 3, a second encapsulating film layer 4, and a second substrate 5, which are stacked sequentially from bottom to top.
[0041] The insulating layer 6 is located between the first encapsulating film layer 2 and the second encapsulating film layer 4. The insulating layer 6 is distributed on the edge region of the upper surface, the side surface and the edge region of the lower surface of the battery cell layer 3. The width of the area covered by the insulating layer 6 on the upper surface of the battery cell layer 3 is different from the width of the area covered by the insulating layer 6 on the lower surface of the battery cell layer 3; or, the insulating layer 6 is bag-shaped, and the battery cell layer 3 is completely covered by the insulating layer 6.
[0042] It should be noted that photovoltaic modules also include components such as the frame 7 and junction box, which can be referred to in the existing technology and will not be described in detail here.
[0043] The cell layer 3 includes multiple cells 31.
[0044] When the photovoltaic module is a single-glass module, the first substrate 1 is the back sheet and the second substrate 5 is a glass substrate; when the photovoltaic module is a double-glass module, both the first substrate 1 and the second substrate 5 are glass substrates.
[0045] This application does not specifically limit the first encapsulation film layer 2 and the second encapsulation film layer 4, and they can be set by themselves. For example, the first encapsulation film layer 2 and the second encapsulation film layer 4 can be EVA (Ethylene Vinyl Acetate) film or POE (Polyolefin Elastomer) film.
[0046] In this embodiment, the distribution area of the insulating layer 6 includes two types. The first type is that the insulating layer 6 is distributed in the upper surface edge area, side surface edge area and lower surface edge area of the battery cell layer 3, that is, the battery cell layer 3 is not completely wrapped by the insulating layer 6. The second type is that the battery cell layer 3 is completely wrapped by the insulating layer 6.
[0047] When the battery cell layer 3 is not completely covered by the insulating layer 66, the width of the area covered by the insulating layer 6 on the upper surface of the battery cell layer 3 can be greater than the width of the area covered by the insulating layer 6 on the lower surface of the battery cell layer 3; or, the width of the area covered by the insulating layer 6 on the upper surface of the battery cell layer 3 can be less than the width of the area covered by the insulating layer 6 on the lower surface of the battery cell layer 3.
[0048] When the battery cell layer 3 is not completely wrapped by the insulating layer 6, it should be noted that the distribution position of the insulating layer 6 in the battery cell layer 3 is not limited in this embodiment, and depends on the situation.
[0049] In one possible implementation, the insulating layer 6 is located on opposite sides of the battery cell layer 3; or, the insulating layer 6 surrounds the battery cell layer 3. When the insulating layer 6 is located on opposite sides of the battery cell layer 3, the amount of insulating layer 6 used can be reduced, thus lowering manufacturing costs.
[0050] As another possible implementation, the insulating layer 6 can also be located on three sides of the battery cell layer 3.
[0051] When the insulating layer 6 is distributed in the edge region of the upper surface, the side surface and the edge region of the lower surface of the battery cell layer 3, the shape of the insulating layer 6 is not limited in this application and can be set by itself.
[0052] As one possible implementation, the shape of the insulating layer 6 includes any one of C-shaped, U-shaped, Y-shaped, and V-shaped, and the opening of the insulating layer 6 faces the battery cell layer 3.
[0053] like Figure 1 and Figure 2 As shown, when the insulating layer 6 is C-shaped, the opening of the insulating layer 6 faces the battery cell layer 3.
[0054] exist Figure 1 In this structure, the insulating layer 6 is located only around the perimeter of the solar cell layer 3. The increased creepage distance on the upper surface of the solar cell layer 3 is the coverage width of the insulating layer 6 on the upper surface of the solar cell layer 3; the increased creepage distance on the lower surface of the solar cell layer 3 is the coverage width of the insulating layer 6 on the lower surface of the solar cell layer 3.
[0055] When the insulating layer 6 is distributed on the edge region of the upper surface, the side surface, and the edge region of the lower surface of the battery cell layer 3, the width of the area covered by the insulating layer 6 on the upper surface and / or the lower surface of the battery cell layer 3 is greater than 1 mm, so as to reduce the difficulty of the manufacturing process.
[0056] like Figure 3 As shown, the insulating layer 6 is bag-shaped, and the entire battery cell layer 3 is enclosed within the insulating layer 6. In this embodiment, the insulating layer 6 completely encloses the battery cell layer 3. The increased creepage distance on the upper surface of the battery cell layer 3 is the coverage width of the insulating layer 6 on the upper surface of the battery cell layer 3; the increased creepage distance on the lower surface of the battery cell layer 3 is the coverage width of the insulating layer 6 on the lower surface of the battery cell layer 3.
[0057] The insulating layer 6, which is in the shape of a bag, has greater insulation properties than the first encapsulating film layer 2 and the second encapsulating film layer 4.
[0058] It should also be noted that the structure of the insulating layer 6 is not limited in this embodiment and can be set by the user.
[0059] In one possible implementation, the insulating layer 6 includes a substrate layer and an adhesive layer, the adhesive layer being bonded to the battery cell layer 3, and the substrate layer being located on the surface of the adhesive layer away from the battery cell layer 3.
[0060] The substrate layer must have a DTI (Difference of Ink) ≥ 0.3 mm, a RTI (Relative Thermal Index) > 90℃, a breakdown voltage > (2000 + 4 * photovoltaic module voltage) V, and a CTI (Comparative Tracking Index) > 600. The substrate layer can be a single-layer or multi-layer structure, and its materials include, but are not limited to, single-component or multi-component composite insulating materials such as PET (polyethylene glycol terephthalate), polyolefins, silicone rubber, resins, organic fibers, PI (polyimide), and PEET (polyetheretherketone). The adhesive layer can also be a single-layer or multi-layer structure, and its materials include, but are not limited to, pressure-sensitive adhesives, hot melt adhesives, POE, EVA, polyolefins, PU (polyurethane), and other resin materials, or rubber-based organic materials. The melting temperature of the pressure-sensitive adhesive must be > 120℃, and the melting temperature of the hot melt adhesive must be > 110℃.
[0061] In this embodiment, the insulating layer 6 is bonded to the battery cell layer 3 via an adhesive layer, which can prevent displacement during the lamination process. The adhesive layer and the battery cell layer 3 can be fixed together using chemical or physical methods such as pressure-sensitive bonding, heat fusion, or thermosetting.
[0062] It should be noted that the thickness of the substrate layer and the adhesive layer is not limited in this application and can be set by the user.
[0063] In one embodiment of this application, the thickness of the substrate layer ranges from 0.05 mm to 0.5 mm; and / or, the thickness of the adhesive layer ranges from 0.01 mm to 0.5 mm.
[0064] If the thickness of the substrate layer is less than 0.05mm, it is too thin, making the insulation layer 6 too thin and difficult to bond with the cell layer 3; if the thickness is greater than 0.5mm, it is too thick, leading to an increase in the manufacturing cost of the photovoltaic module.
[0065] The adhesive layer can play a certain buffering role. If the adhesive layer is too thin, the buffering effect is poor and the battery cell 31 is easy to break. If the adhesive layer is too thick, it will increase the cost.
[0066] As another possible implementation, the insulating layer 6 is an insulating coating, which is applied to the battery cell layer 3.
[0067] Insulating coatings include, but are not limited to, organic and inorganic coatings such as alumina coatings, beryllium oxide coatings, epoxy resin coatings, polyurethane coatings, fluorocarbon coatings, polyimide coatings, acrylic coatings, and polyethylene coatings.
[0068] The thickness of the insulating coating can range from 0.01mm to 0.5mm. It is important to avoid coatings that are too thin, as this will result in poor insulation, and coatings that are too thick, as this will increase manufacturing costs.
[0069] The width of the insulating coating on the upper and lower surfaces of the battery cell layer 3 can range from 1 mm to 50 mm.
[0070] It should be noted that this application does not limit the type of battery string. For example, the battery string in the battery cell layer 3 includes any one of multi-segment battery strings, half-cell battery strings, and whole-cell battery strings.
[0071] The cell 31 in a multi-segment battery string can be a three-segment battery, a four-segment battery, a five-segment battery, etc., and this application does not limit it. The cell 31 in a half-cell battery string is a half-cell battery. The cell 31 in a full-cell battery string is a full-cell battery.
[0072] When the battery string is a multi-segment battery string, the internal loss of the photovoltaic module can be reduced and the efficiency of the photovoltaic module can be improved.
[0073] In one embodiment of this application, when the battery string is a multi-segment battery string, the distance between adjacent battery segments 31 in the battery string ranges from -1.5mm to 1.5mm.
[0074] When two adjacent solar cells 31 are just touching, the distance is 0; when two adjacent solar cells 31 overlap, the distance is less than 0; when two adjacent solar cells 31 are not touching and do not overlap, the distance is greater than 0.
[0075] In this embodiment, by setting the distance between adjacent solar cells 31 to -1.5mm to 1.5mm, more solar cells 31 can be set in the photovoltaic module, thereby improving the power generation efficiency of the photovoltaic module.
[0076] In this embodiment, the photovoltaic module, in addition to the first substrate 1, the first encapsulating film layer 2, the cell layer 3, the second encapsulating film layer 4, and the second substrate 5, also includes an insulating layer 6. The insulating layer 6 surrounds at least around the cell layer 3 and is distributed on the upper, side, and lower surfaces of the cell layer 3. Therefore, the distance (i.e., creepage distance) between the conductors in the cell layer 3 and the edges of the first substrate 1 and the second substrate 5 is increased. The increased creepage distance is equal to the width of the insulating layer 6 located on the upper or lower surface of the cell layer 3. Because the creepage distance is increased in the photovoltaic module of this application, the area of the photovoltaic module can be utilized more fully, thereby improving the utilization efficiency of the photovoltaic module.
[0077] Based on the above embodiments, in one embodiment of this application, when the insulating layer 6 is located on opposite sides of the battery cell layer 3, the battery cell layer 3 includes a plurality of battery strings and busbars 32, and the battery strings include a plurality of battery cells; the busbars are distributed on the first and second opposite sides of the battery cell layer 3, and the battery cells are distributed on the third and fourth opposite sides of the battery cell layer 3.
[0078] The insulating layer 6 is distributed on the upper, side and lower surfaces of the busbar 32 on the first and second sides.
[0079] like Figure 4 As shown, the insulating layer 6 is only provided on both sides of the busbar in the battery cell layer 3, and the other two sides are not provided with the insulating layer 6.
[0080] The busbar 32 is located on both sides of the short side of the cell layer 3, which can increase the creepage distance of the short side of the photovoltaic module. Since the creepage distance of the short side is increased, the distance between the busbar 32 and the edges of the first substrate 1 and the second substrate 5 can be shortened, thereby increasing the area occupied by the cell 31 in the cell layer 3. This allows for a larger spacing between the cells 31 or a larger size of the cell 31 along the long side of the photovoltaic module, thereby improving the power of the photovoltaic module.
[0081] Based on the above embodiments, in one embodiment of this application, when the insulating layer 6 surrounds the battery cell layer 3, the battery cell layer 3 includes a plurality of battery strings and busbars 32, and the battery strings include a plurality of battery cells 31; the busbars 32 are distributed on the first and second opposite sides of the battery cell layer 3, and the battery cells 31 are distributed on the third and fourth opposite sides of the battery cell layer 3.
[0082] The insulating layer 6 is distributed on the upper surface, side surface and lower surface of the busbar 32 on the first side and the second side;
[0083] The insulating layer 6 is distributed on the upper, side and lower surfaces of the battery cell 31 on the third and fourth sides.
[0084] The battery cells 31 in the battery string are connected in series, and the busbar 32 is used to collect the current in the battery string.
[0085] In this embodiment, the busbar 32 is located at the two edges of the battery cell layer 3.
[0086] It should be noted that the form of the insulating layer 6 is not limited in this embodiment and can be set by the user.
[0087] As one possible implementation method, such as Figure 5 As shown, the insulating layer 6 is C-shaped as an example. On the first and second sides of the cell layer 3, the insulating layer 6 covers the upper surface, side surface and lower surface of the busbar 32; on the third and fourth sides, the insulating layer 6 covers the upper surface edge region, side surface and lower surface edge region of the cell 31.
[0088] The busbar 32 is located on both sides of the short side of the cell layer 3, which increases the creepage distance at the short side of the photovoltaic module. Because of this increased creepage distance, the distance between the busbar 32 and the edges of the first substrate 1 and the second substrate 5 can be shortened. This allows the cell 31 to occupy a larger area in the cell layer 3, resulting in a larger inter-cell spacing or a larger cell 31 dimension along the long side of the photovoltaic module, thereby increasing the photovoltaic module's power output. Similarly, the insulating layer 6 is also provided on both sides of the long side of the cell layer 3. This also increases the creepage distance along the long side of the photovoltaic module, allowing the cell 31 dimension to increase along the short side of the photovoltaic module, further improving the photovoltaic module's power output.
[0089] Based on the above embodiments, in one embodiment of this application, when the insulating layer 6 surrounds the battery cell layer 3, the battery cell layer 3 includes a plurality of battery strings and a busbar 32, the battery string includes a plurality of battery cells 31, and the busbar 32 is located on the side of the battery cell layer 3 close to the first encapsulating film layer 2.
[0090] The insulating layer 6 is distributed on the upper, side and lower surfaces of the battery cell 31 around the battery cell layer 3.
[0091] In this embodiment, the busbar 32 is disposed on the lower surface of the battery cell 31, that is, the busbar is hidden between the battery cell 31 and the first encapsulation film layer 2.
[0092] As one possible implementation, the shape of the insulating layer 6 includes any one of C-shape, U-shape, Y-shape, and V-shape, with the opening of the insulating layer 6 facing the battery cell layer 3. Figure 6As shown, the insulating layer is C-shaped as an example. On the first, second, third, and fourth sides of the cell layer 3, the insulating layer 6 covers the upper surface edge region, side surface edge region, and lower surface edge region of the cell 31.
[0093] The width error of the area covered by the insulating layer on the upper and lower surfaces of the solar cell 31 is ≤2mm.
[0094] Based on any of the above embodiments, in one embodiment of this application, the distance between the periphery of the battery cell layer 3 and the edge of the first substrate 1 is greater than or equal to 6 mm.
[0095] That is, the distance between the four edges of the battery cell layer 3 and the edge of the second substrate 5 is greater than or equal to 6 mm.
[0096] If the distance between the edges of the cell layer 3 and the edge of the first substrate 1 is too small, the cell 31 may be covered by the frame, affecting the power generation of the cell 31 and thus affecting the efficiency of the photovoltaic module.
[0097] Based on any of the above embodiments, in one embodiment of this application, the photovoltaic module may further include:
[0098] An anti-ultraviolet film layer and / or an ultraviolet cut-off film layer located on the surface of the insulating layer 6 away from the battery cell layer 3.
[0099] The UV-resistant film layer can be a film layer containing fluorine or other materials. By setting a UV-resistant film layer and / or a UV-blocking film layer on the surface of the insulating layer 6, damage to the insulating layer 6 by ultraviolet rays can be avoided, cracking and other problems in the insulating layer 6 can be prevented, and the creepage effect can be guaranteed.
[0100] In this embodiment, the thickness of the anti-ultraviolet film layer is not limited and can be set by the user.
[0101] As one possible implementation, the thickness of the anti-ultraviolet film layer is in the range of 0.01 mm to 0.1 mm to ensure the anti-ultraviolet effect of the anti-ultraviolet film layer.
[0102] The following describes the fabrication method of the photovoltaic module in this application, with the insulating film being C-shaped.
[0103] Example 1
[0104] Step 1: Lay the second substrate and the second encapsulating film layer together;
[0105] Step 2: Pre-apply the insulating film onto the second encapsulating film layer, at the edge of the pre-applied battery cell layer;
[0106] Step 3: Lay out the solar cell layer, with the edge of the solar cell layer pressed against the insulating layer near the inner edge of the photovoltaic module;
[0107] Step 4: Fold the side of the insulating layer away from the inside of the photovoltaic module upwards, and press the other edge of the insulating layer over the edge of the cell layer to achieve the covering of the cell layer by the insulating layer.
[0108] Step 5: Lay the first encapsulating film layer and the first substrate in sequence to obtain a laminated component;
[0109] Step 6: The laminated parts are formed into a laminate by high-temperature lamination of the laminated parts;
[0110] Step 7: Install the frame and junction box to complete the module manufacturing and obtain the photovoltaic module.
[0111] Example 2
[0112] Step 1: Lay the second substrate and the second encapsulating film layer together;
[0113] Step 2: Arrange the battery strings according to the circuit, and at the same time complete the welding of the busbars to form battery cell layers;
[0114] Step 3: After lifting the battery cell layer, insert it into the C-shaped insulating layer, and use hot pressing or pressure-sensitive methods to bond and fix the insulating layer material to the battery cell layer;
[0115] Step 4: Lay the first encapsulating film layer and the first substrate in sequence to obtain a laminated component;
[0116] Step 5: The laminated parts are formed into a laminate by high-temperature lamination of the laminated parts;
[0117] Step 6: Install the frame and junction box to complete the module manufacturing and obtain the photovoltaic module.
[0118] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0119] The photovoltaic modules provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.
Claims
1. A photovoltaic module, characterized by, It includes an insulating layer, a first substrate, a first encapsulating film layer, a battery cell layer, a second encapsulating film layer, and a second substrate, which are stacked sequentially from bottom to top. The insulating layer is located between the first encapsulating film layer and the second encapsulating film layer. The insulating layer is distributed on the edge region of the upper surface, the side surface, and the edge region of the lower surface of the battery cell layer. The width of the area covered by the insulating layer on the upper surface of the battery cell layer is different from the width of the area covered by the insulating layer on the lower surface of the battery cell layer. Alternatively, the insulating layer is bag-shaped, and the entire battery cell layer is covered within the insulating layer.
2. The photovoltaic module of claim 1, wherein, When the insulating layer is distributed on the edge region of the upper surface, the side surface, and the edge region of the lower surface of the battery cell layer, the shape of the insulating layer includes any one of C-shape, U-shape, Y-shape, and V-shape, and the opening of the insulating layer faces the battery cell layer.
3. The photovoltaic module of claim 1, wherein, The insulating layer is located on opposite sides of the battery cell layer; or, the insulating layer surrounds the battery cell layer.
4. The photovoltaic module of claim 3, wherein, When the insulating layer is located on opposite sides of the battery cell layer, the battery cell layer includes multiple battery strings and busbars, and the battery strings include multiple battery cells; the busbars are distributed on the first and second opposite sides of the battery cell layer, and the battery cells are distributed on the third and fourth opposite sides of the battery cell layer; The insulating layer is distributed on the upper, side, and lower surfaces of the busbar on the first and second sides.
5. The photovoltaic module of claim 3, wherein, When the insulating layer surrounds the battery cell layer, the battery cell layer includes multiple battery strings and busbars, and the battery strings include multiple battery cells; the busbars are distributed on the first and second opposite sides of the battery cell layer, and the battery cells are distributed on the third and fourth opposite sides of the battery cell layer; The insulating layer is distributed on the upper, side, and lower surfaces of the busbar on the first and second sides; The insulating layer is distributed on the upper, side, and lower surfaces of the battery cell on the third and fourth sides.
6. The photovoltaic module of claim 3, wherein, When the insulating layer surrounds the battery cell layer, the battery cell layer includes a plurality of battery strings and a busbar, the battery string includes a plurality of battery cells, and the busbar is located on the side of the battery cell layer close to the first encapsulating film layer; The insulating layer is distributed on the upper, side and lower surfaces of the battery cells around the battery cell layer.
7. The photovoltaic module of claim 1, wherein, The width of the area covered by the insulating layer on the upper and / or lower surface of the battery cell layer is greater than 1 mm.
8. The photovoltaic module of claim 1, wherein, The insulating layer includes a substrate layer and an adhesive layer, the adhesive layer being bonded to the battery cell layer, and the substrate layer being located on the surface of the adhesive layer away from the battery cell layer.
9. The photovoltaic module of claim 8, wherein, The thickness of the substrate layer is in the range of 0.05 mm to 0.5 mm; and / or the thickness of the adhesive layer is in the range of 0.01 mm to 0.5 mm.
10. The photovoltaic module of claim 1, wherein, The insulating layer is an insulating coating.
11. The photovoltaic module of claim 1, wherein, The distance between the four edges of the battery cell layer and the edge of the first substrate is greater than or equal to 6 mm.
12. The photovoltaic module of claim 1, wherein, The battery strings in the battery cell layer include any one of the following: multi-segment battery strings, half-cell battery strings, and whole-cell battery strings.
13. The photovoltaic module of claim 12, wherein, When the battery string is a multi-segment battery string, the distance between adjacent battery segments in the battery string ranges from -1.5mm to 1.5mm.
14. The photovoltaic module of any of claims 1 to 13, wherein, Also includes: An anti-ultraviolet film layer and / or an ultraviolet cut-off film layer located on the surface of the insulating layer away from the battery cell layer.
15. The photovoltaic module of claim 14, wherein, The thickness of the UV-resistant film layer ranges from 0.01 mm to 0.1 mm.