A photovoltaic module and a method of manufacturing the same, a photovoltaic system

Abstract

The application discloses a photovoltaic module, a preparation method thereof and a photovoltaic system. The photovoltaic module has multiple edges, and the connecting area of adjacent edges is the corner area of the photovoltaic module. The photovoltaic module comprises a cell string group, a first cover plate and a second cover plate located on both sides of the cell string group, an insulating adhesive film, multiple insulating adhesive blocks and multiple sections of insulating adhesive tapes. The insulating adhesive film is located between the first cover plate and the second cover plate and covers the cell string group. The insulating adhesive film is provided with a notch corresponding to the corner area of the photovoltaic module. The multiple insulating adhesive blocks are filled in the notches. The insulating performance of the insulating adhesive blocks is superior to that of the insulating adhesive film. The number of the insulating adhesive tapes corresponds to the number of the edges of the photovoltaic module. Each section of the insulating adhesive tapes covers each edge of the photovoltaic module, extends from the back of the photovoltaic module to the front of the photovoltaic module via the side of the photovoltaic module, and insulates the photovoltaic module together with the insulating adhesive blocks. The application improves the sealing and insulation of the photovoltaic module.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a photovoltaic module and its preparation method, as well as a photovoltaic system. Background Technology

[0002] The sealing and insulation performance of photovoltaic (PV) modules directly determine their outdoor service life and power generation reliability. Moisture intrusion and insulation failure caused by sealing defects at the edges of PV modules are among the factors leading to power degradation, internal circuit corrosion, and even safety malfunctions.

[0003] In existing photovoltaic module encapsulation structures, after lamination, insulating tape needs to be wrapped around the entire side of the photovoltaic module to achieve edge protection and insulation sealing. However, for rectangular photovoltaic modules, the four corners protrude, and the insulating tape needs to be bent when covering the corners. The bends are prone to wrinkles and poor adhesion, resulting in cavities and air bubbles. This leads to poor insulation performance of the insulating tape and reduces the long-term reliability of the photovoltaic module. Summary of the Invention

[0004] This invention provides a photovoltaic module and its preparation method, as well as a photovoltaic system, to solve the problem that bending insulating tape easily produces wrinkles, leading to poor insulation of the photovoltaic module.

[0005] According to one aspect of the present invention, a photovoltaic module is provided, the photovoltaic module having a plurality of edges, the connection region of adjacent edges being a corner region of the photovoltaic module; the photovoltaic module further includes: Battery string assembly, and a first cover plate and a second cover plate located on both sides of the battery string assembly; An insulating film is located between the first cover plate and the second cover plate and covers the battery string; the insulating film has notches corresponding to the corner areas of the photovoltaic module; Multiple insulating adhesive blocks are respectively filled into each of the notches; wherein the insulating properties of the insulating adhesive blocks are superior to those of the insulating film. Multiple segments of insulating tape, the number of which corresponds to the number of edges of the photovoltaic module, each segment of insulating tape covering the edge of each photovoltaic module, extending from the back of the photovoltaic module through the side of the photovoltaic module to the front of the photovoltaic module; the insulating tape and the insulating block together insulate the photovoltaic module.

[0006] Optionally, each end of the insulating tape corresponds to an insulating block; along the thickness direction of the photovoltaic module, the projection of the insulating tape overlaps with the projection of the corresponding insulating block.

[0007] Optionally, two segments of insulating tape are provided in the corner area of ​​the photovoltaic module, and the two segments of insulating tape in the corner area do not overlap.

[0008] Optionally, along the thickness direction of the photovoltaic module, the side length of the projection of the insulating block is greater than a set value, so that the projection of the insulating tape overlaps with that of the insulating block while two adjacent segments of the insulating tape do not overlap.

[0009] Optionally, the length of the insulating tape extending to the front or back of the photovoltaic module is a first length; The set value is greater than the first length.

[0010] Optionally, a gap exists between the insulating film and the insulating block.

[0011] Optionally, the insulating block is made of butyl rubber.

[0012] Optionally, the insulating tape is made of one or more of polyolefin, polyethylene terephthalate, or polyimide.

[0013] According to another aspect of the present invention, a method for manufacturing a photovoltaic module is provided, comprising: A first insulating film is coated on the first cover plate; wherein, the first insulating film has a notch corresponding to the corner area of ​​the photovoltaic module; Apply an insulating adhesive block to the notch; The side of the first cover plate coated with the first insulating film is attached to the side of the battery string assembly. A second insulating film is coated on the second cover plate; wherein the second insulating film has a notch corresponding to the corner area of ​​the photovoltaic module; The side of the second cover plate coated with the second insulating film is bonded to the other side of the battery string and laminated to obtain an intermediate product of the photovoltaic module. The insulating tape is applied to multiple edges of the intermediate product.

[0014] Optionally, in the step of coating the insulating block in the notch, the distance between the insulating block and the first insulating film is greater than a set distance, so that there is a gap between the insulating block and the first insulating film after lamination; And / or, in the process of attaching the insulating tape to the multiple edges of the intermediate product, the projection of the insulating tape overlaps with the projection of the corresponding insulating block, and adjacent segments of the insulating tape do not overlap.

[0015] According to another aspect of the present invention, a photovoltaic system is provided, comprising: a photovoltaic module as described in any of the above embodiments.

[0016] This invention addresses the shortcomings of existing technologies that use a complete wrapping method with insulating tape. This method creates wrinkles, cavities, and air bubbles at the corners, leading to decreased edge sealing and insulation performance and low overall reliability of the photovoltaic module. The invention strengthens the edge sealing and insulation protection of the photovoltaic module, improves operational reliability, and extends its outdoor weather resistance.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of a photovoltaic module provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure covered with insulating film; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the middle AA; Figure 4 This is a top view of another photovoltaic module provided in an embodiment of the present invention; Figure 5 This is a top view of another photovoltaic module provided in an embodiment of the present invention; Figure 6 yes Figure 1 Enlarged view of the central corner region; Figure 7 and Figure 8 This is a flowchart of a photovoltaic module manufacturing method provided in an embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] This invention provides a photovoltaic module. Figure 1 This is a top view of a photovoltaic module provided in an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of the structure covered with insulating film. Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the middle AA section. (See attached diagram.) Figures 1-3 The photovoltaic module includes a battery string 110 and a first cover plate 120 and a second cover plate 130 located on both sides of the battery string 110. The photovoltaic module has multiple edges, and the connection area between adjacent edges is the corner region S of the photovoltaic module.

[0023] The photovoltaic module also includes an insulating film 140, multiple insulating blocks 150, and multiple segments of insulating tape 160. The insulating film 140 is located between the first cover plate 120 and the second cover plate 130 and covers the battery string 110; the insulating film 140 has a notch corresponding to the corner area S of the photovoltaic module; multiple insulating blocks 150 are respectively filled into each notch; wherein, the insulating performance of the insulating blocks 150 is better than that of the insulating film 140; the number of insulating tapes 160 corresponds to the number of edges of the photovoltaic module, and each segment of insulating tape 160 covers the edge of each photovoltaic module, extending from the back of the photovoltaic module through the side of the photovoltaic module to the front of the photovoltaic module; the insulating tapes 160 and the insulating blocks 150 together insulate the photovoltaic module.

[0024] The battery string 110 is a structure in a photovoltaic module used to achieve photoelectric conversion. Specifically, the battery string 110 may include multiple solar cells, which can be connected in series to form a battery string. The battery strings can be connected in series, parallel, or a combination of series and parallel to achieve current collection and output. For example, the connection between individual cells can be achieved by welding solder strips, or the connection between battery strings can be achieved by busbars.

[0025] The first cover plate 120 can be a front glass, serving as a protective layer on the front of the photovoltaic module, and is positioned facing the light source. It can be ultra-clear glass, which has high light transmittance, high transparency, and superior physical, mechanical, and optical properties. For example, the light transmittance of ultra-clear glass can reach over 92%, which can protect the solar cells without affecting their efficiency as much as possible.

[0026] The second cover plate 130 can be a back sheet, serving as a protective layer on the back of the photovoltaic module. It works in conjunction with the first cover plate 120 to protect, support, and seal the photovoltaic module. It has reliable insulation, water resistance, and aging resistance. There are multiple options for the back sheet, which can typically be tempered glass, plexiglass, aluminum alloy TPT composite film, etc. The specific choice can be made according to the specific situation and is not limited here.

[0027] The insulating film 140 is a transparent colloid with good light transmittance and aging resistance. The insulating film 140 wraps around the outside of the battery string 110, specifically filling the space between the light-facing side of the solar cell and the first cover plate 120, between the back-facing side of the solar cell and the second cover plate 130, and on the sides of the battery string 110 as a filler. Partial material is removed from the insulating film 140 at the four corner areas S corresponding to the photovoltaic module, forming gaps to provide filling space for the insulating block 150. Simultaneously, the insulating film 140 can bond the first cover plate 120 and the solar cell together, and its placement can seal and insulate the solar cell, as well as provide waterproofing and moisture protection.

[0028] The insulating block 150 is a sealing and insulating component that fills multiple corner areas S of the insulating film 140, working together with the insulating film 140 to insulate and encapsulate the battery string 110. The insulating block 150 has superior insulation and sealing performance compared to the insulating film 140, ensuring that the photovoltaic module's insulation level and sealing protection level are not affected by gaps in the insulating film 140. The insulating block 150 only fills within the gaps, preventing the insulating tape 160 from directly covering the four corners of the photovoltaic module, thus solving the problem of wrinkles and cavities formed by the insulating tape 160 at the corners of the photovoltaic module, leading to a decrease in sealing and insulation performance. Furthermore, it is understood that because the insulating block 150 has superior sealing and insulation performance compared to the insulating film 140, its cost is higher. This embodiment of the invention, by placing the insulating block 150 only within the gaps of the insulating film 140, saves materials and reduces costs.

[0029] Insulating tape 160 is a segmented edge protection component that only covers the straight edge area of ​​the photovoltaic module, excluding the corner area S. It works in conjunction with insulating block 150 to achieve insulation and sealing protection of the photovoltaic module's edges. Insulating tape 160 can be made of materials that are UV-resistant, resistant to high and low temperatures, resistant to damp heat aging, and suitable for long-term outdoor service environments, such as photovoltaic-specific PET (polyethylene terephthalate) insulating tape, PP (polypropylene) insulating tape, fluoropolymer tape, or epoxy tape. Although insulating tape 160 does not cover the corner area S, insulating block 150 has superior sealing and insulation performance; therefore, it will not affect the insulation level and sealing protection level of the photovoltaic module in the corner area S.

[0030] This invention addresses the shortcomings of existing technologies that use insulating tape 160 to cover only the straight edges of the photovoltaic module and avoid the four corners. This solves the problem that the overall covering method of insulating tape 160 easily produces wrinkles, cavities and air bubbles at the four corners, which leads to a decrease in the edge sealing and insulation performance of the photovoltaic module and low overall reliability. This invention achieves the beneficial effects of strengthening the edge sealing and insulation protection of the photovoltaic module, improving the operational reliability of the photovoltaic module and its outdoor weather resistance service life.

[0031] See also Figure 2 and Figure 3 Based on the above embodiments, optionally, each end of the insulating tape 160 corresponds to an insulating block 150; along the thickness direction of the photovoltaic module, the projection of the insulating tape 160 overlaps with the projection of the corresponding insulating block 150.

[0032] In this embodiment, the overlap between the projection of the insulating tape 160 and the corresponding projection of the insulating block 150 means that the end of the insulating tape 160 and the area of ​​the insulating block 150 overlap each other, with the splicing position continuous without any breaks or gaps. If there are gaps between the insulating tape 160 and the insulating block 150, external moisture and dust can easily seep into the photovoltaic module along the gaps, damaging the encapsulation structure. In this embodiment, through the overlapping of projections, the straight edge of the insulating tape 160 and the corner area S of the insulating block 150 can form a continuous and complete edge seal, significantly improving the sealing and protection effect.

[0033] See also Figure 2 Based on the above embodiments, optionally, two segments of insulating tape 160 are provided in the corner region S of the photovoltaic module, and the two segments of insulating tape 160 in the corner region S do not overlap.

[0034] If two sections of insulating tape overlap at the corner S, a height difference can easily form. During the bonding process, air can easily be trapped, creating air bubbles that are difficult to remove, leading to loose edge bonding and seal gaps. This embodiment effectively avoids the steps, height differences, and air bubble defects caused by overlapping tapes, ensuring a smooth edge bonding of the photovoltaic module, improving overall sealing, and preventing moisture intrusion and insulation failure caused by air bubbles, thus enhancing the long-term reliability of the photovoltaic module.

[0035] See also Figure 2 Based on the above embodiments, optionally, along the thickness direction of the photovoltaic module, the side length D of the projection of the insulating block 150 is greater than a set value, so that the projection of the insulating tape 160 overlaps with that of the insulating block 150 while the two adjacent segments of the insulating tape 160 do not overlap.

[0036] For example, the projection of the insulating block 150 is square, with all four sides being of equal length. As can be seen from the aforementioned embodiments, along the thickness direction of the photovoltaic module, the projection of the insulating tape 160 overlaps with the projection of the corresponding insulating block 150. This arrangement allows the straight-edged insulating tape 160 and the insulating block 150 in the corner region S to form a continuous and complete edge seal. Furthermore, by ensuring that the two segments of insulating tape 160 in the corresponding corner region S do not overlap, the problem of moisture intrusion and insulation failure caused by air bubbles can be further avoided. The selected setting value ensures that the projection coverage of the insulating block 150 is large enough to completely accommodate the portion of the insulating tape 160 extending into the corner region S of the photovoltaic module.

[0037] Figure 4 This is a top view of another photovoltaic module provided in an embodiment of the present invention. Specifically, as shown... Figure 4 As shown, with Figure 2The difference is that when the projected side length D of the insulating block 150 is less than the set value, if the projection of the insulating tape 160 is set to overlap with the projection of the corresponding insulating block 150 along the thickness direction of the photovoltaic module, the two segments of insulating tape 160 in the corresponding corner area S will also overlap.

[0038] Compared to Figure 4 , Figure 2 Setting the projected side length D of the insulating block 150 to be greater than the set value ensures that its projected range is sufficient to meet the overlap requirements of the insulating tape 160 ends. In this way, the ends of the insulating tape 160 can fall within the projected range of the insulating block 150, forming an overlap and avoiding seams. Simultaneously, the large-sized insulating block 150 can separate the ends of adjacent insulating tape segments 160; the end of each insulating tape segment 160 only overlaps with the insulating block 150 and cannot cross the area of ​​the insulating block 150 to intersect with another insulating tape segment 160. This prevents the two insulating tape segments 160 from overlapping in the corner area S, eliminating encapsulation defects such as steps and bubbles caused by overlapping insulating tapes 160.

[0039] See also Figure 2 Based on the above embodiments, optionally, the length of the insulating tape 160 extending to the front or back of the photovoltaic module is a first length L; wherein, the set value is greater than the first length L.

[0040] The setting value is constrained by the dimension of the first length L, which prevents adjacent segments of insulating tape 160 from overlapping in the corner region S, avoiding encapsulation defects such as steps and bubbles caused by overlapping insulating tape 160, and improving the flatness and reliability of the photovoltaic module edges. Specifically, with Figure 2 Taking the upper right corner region S of the photovoltaic module as an example, the first length L of the two insulating tapes 160 extending into the corner region S is equal. That is, the insulating tape 160 extending in the horizontal direction and the insulating tape 160 extending in the vertical direction have the same coverage length when extending into the corner region S. The set value is greater than the first length L, so that the end of each insulating tape 160 cannot overlap with the end of the other insulating tape 160.

[0041] It should be noted that in the above embodiments, the example of the insulating block 150 having a square projection shape is used for illustration and is not intended to limit the invention. In other embodiments, the insulating block 150 may also have a rectangular or other shape.

[0042] Figure 5 This is a top view of another photovoltaic module provided in an embodiment of the present invention. See also Figure 5In another embodiment, optionally, the projected shape of the insulating block 150 is rectangular, with its short side longer than the first length L, and correspondingly, the long side of the rectangle is also longer than the first length L. When the short side of the projected shape of the insulating block 150 is shorter than the first length L, the end of the insulating tape 160 extending towards the corner region S will not completely fall within the projected coverage area of ​​the insulating block 150, resulting in a gap between the insulating tape 160 and the insulating block 150. External moisture and dust can easily seep into the photovoltaic module through this gap, damaging the edge sealing continuity of the photovoltaic module.

[0043] Figure 6 yes Figure 1 A magnified view of the central corner area. See also... Figure 6 Optionally, based on the above embodiments, there is a gap W1 between the insulating film 140 and the insulating block 150.

[0044] In the photovoltaic module encapsulation process, the insulating film 140 and the insulating block 150 differ in materials and curing processes. The reserved gap W1 prevents internal stress caused by inconsistent expansion and contraction rates during thermal expansion and contraction or lamination curing, thus preventing wrinkling of the insulating film 140, displacement of the insulating block 150, or edge warping. Furthermore, the gap W1 between the insulating film 140 and the insulating block 150 also prevents overlap between them, which could lead to puncture failure.

[0045] Based on the above embodiments, optionally, the material of the insulating block 150 is butyl rubber.

[0046] Butyl rubber possesses excellent moisture barrier properties, self-adhesion, and elasticity, enabling it to maintain a tight interface adhesion over a long period. As a sealing and insulating block, it can reliably overlap with insulating tape 160°, strengthening edge sealing and blocking moisture penetration paths. Butyl rubber exhibits excellent weather resistance and aging resistance, making it less prone to cracking and failure during long-term outdoor service. It also possesses good electrical insulation properties, improving the insulation safety level of the corner area S of photovoltaic modules.

[0047] Based on the above embodiments, optionally, the material of the insulating film 140 is an ethylene-vinyl acetate copolymer.

[0048] The ethylene-vinyl acetate copolymer possesses excellent light transmittance, adhesion, and weather resistance, enabling it to firmly bond the first cover plate 120, the second cover plate 130, and the battery string 110, forming a stable encapsulation layer that effectively protects the internal battery string 110 from moisture and dust corrosion. Furthermore, the ethylene-vinyl acetate copolymer exhibits good insulation properties, meeting the internal electrical insulation requirements of photovoltaic modules.

[0049] Based on the above embodiments, optionally, the material of the insulating tape 160 is one or more of polyolefin (PO), polyethylene terephthalate (PET), or polyimide (PI).

[0050] Among them, PO possesses excellent moisture barrier properties, effectively improving the weather resistance and reliability of photovoltaic modules; PET boasts high mechanical strength, controllable cost, and good process adaptability; PI, with its high-temperature resistance and radiation resistance, can meet the high-end protection requirements under extreme conditions. Preferably, the 160mm insulating tape is made of PO. Compared to PI, PO is lower in cost; compared to PET, PO has superior moisture barrier properties, enabling a reliable seal at the edges of photovoltaic modules. Therefore, PO achieves the best balance between protective performance and manufacturing cost, making it more suitable for the application needs of large-scale production of photovoltaic modules.

[0051] The present invention also provides a method for preparing a photovoltaic module. Figure 7 and Figure 8 This is a flowchart illustrating a method for manufacturing a photovoltaic module according to an embodiment of the present invention. See also... Figure 7 and Figure 8 The preparation method of photovoltaic modules includes the following steps: S110, A first insulating film 141 is coated on the first cover plate 120; wherein, the first insulating film 141 has a notch in the corner region S of the photovoltaic module; S120, Apply insulating adhesive block 150 to the notch; S130, The side of the first cover plate 120 coated with the first insulating film 141 is attached to the side of the battery string 110. S140, A second insulating film 142 is coated on the second cover plate 130; wherein, the second insulating film 142 has a notch in the corner region S of the photovoltaic module; S150, The side of the second cover plate 130 coated with the second insulating film 142 is bonded to the other side of the battery string 110 and laminated to obtain an intermediate product of photovoltaic module. S160. Apply insulating tape 160 to each of the multiple edges of the intermediate product.

[0052] In this embodiment, the corner area S of the photovoltaic module is filled and sealed with insulating adhesive blocks 150, avoiding the need for insulating tape 160 to bend and wrap around the four corners of the module. This eliminates the problems of wrinkles, curling edges, and cavities formed by the insulating tape 160, significantly improving the sealing reliability and insulation stability of the corner area S. The insulating tape 160 is only adhered to the straight edge of the photovoltaic module and connects with the insulating adhesive blocks 150 in the corner area S, ensuring the continuity of the overall edge seal and avoiding encapsulation defects such as tape overlap, steps, and bubbles. In this embodiment, the lamination process and the insulating tape 160 adhesion process are implemented in steps, further improving the sealing and insulation of the photovoltaic module edges without increasing costs, extending the service life of the photovoltaic module, and improving its electrical safety performance.

[0053] See also Figure 7 and Figure 8 Based on the above embodiments, optionally, in step S120, when coating the insulating adhesive block 150 in the notch, the distance W1 between the insulating adhesive block 150 and the first insulating film 141 is greater than a set distance, so that there is a gap W2 between the insulating adhesive block 150 and the first insulating film 141 after lamination.

[0054] During the lamination process, the material will be heated, melt, flow and undergo certain deformation. The distance W1 between the insulating block 150 and the first insulating film 141 is greater than the set distance, which can provide stress release space for the insulating block 150 and the first insulating film 141, and prevent them from squeezing each other due to the different expansion and contraction characteristics of the two materials. This avoids problems such as wrinkling of the first insulating film 141, displacement of the insulating block 150, interface warping or overlap of the first insulating film 141 and the insulating block 150, which can lead to puncture failure. This improves the appearance and structural stability of the photovoltaic module after lamination.

[0055] Optionally, based on the above embodiments, when insulating tape 160 is pasted on multiple edges of the intermediate product, the projection of the insulating tape 160 overlaps with the projection of the corresponding insulating block 150, and two adjacent segments of insulating tape 160 do not overlap.

[0056] On the one hand, by overlapping the projections of the insulating tape 160 and the insulating block 150, a continuous and gapless sealing structure can be formed at the edge of the photovoltaic module, preventing moisture and dust from seeping in, while effectively extending the creepage distance and improving electrical insulation safety. On the other hand, by ensuring that adjacent sections of insulating tape 160 do not overlap in the corner area S, it is possible to avoid height differences, steps, and air bubbles caused by overlapping of the insulating tape 160, ensuring that the edges of the photovoltaic module are flat and adhered, and improving the encapsulation quality and long-term reliability of the photovoltaic module.

[0057] Based on the above embodiments, optionally, the photovoltaic module also includes a structure such as a metal frame, wherein the metal frame serves as the main external support structure of the entire photovoltaic module and can provide stable support and installation for the photovoltaic module. For example, the photovoltaic module can be installed at the required installation location through the metal frame.

[0058] The present invention also provides a photovoltaic system, including photovoltaic modules as described in any of the above embodiments, and having corresponding beneficial effects.

[0059] Specifically, photovoltaic (PV) systems can be applied in PV power plants, such as ground-mounted, rooftop, and floating power plants, as well as in equipment or devices that utilize solar energy to generate electricity, such as user solar power supplies, solar streetlights, solar cars, and solar buildings. Of course, it's understandable that the application scenarios for PV systems are not limited to these; that is, PV systems can be applied in all areas that require solar energy for power generation. Taking a PV power grid as an example, a PV system can include PV arrays, combiner boxes, and inverters. A PV array can be a combination of multiple PV modules; for example, multiple PV modules can form multiple PV arrays. The PV arrays are connected to combiner boxes, which collect the current generated by the PV arrays. The collected current then flows through an inverter, converting it into AC power required by the mains grid before being connected to the mains grid to achieve solar power supply.

[0060] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0061] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A photovoltaic module, characterized in that, The photovoltaic module has multiple edges, and the connection area between adjacent edges forms the corner region of the photovoltaic module; the photovoltaic module also includes: Battery string assembly, and a first cover plate and a second cover plate located on both sides of the battery string assembly; An insulating film is located between the first cover plate and the second cover plate and covers the battery string; the insulating film has notches corresponding to the corner areas of the photovoltaic module; Multiple insulating adhesive blocks are respectively filled into each of the notches; wherein the insulating properties of the insulating adhesive blocks are superior to those of the insulating film. Multiple segments of insulating tape, the number of which corresponds to the number of edges of the photovoltaic module, each segment of insulating tape covering the edge of each photovoltaic module, extending from the back of the photovoltaic module through the side of the photovoltaic module to the front of the photovoltaic module; the insulating tape and the insulating block together insulate the photovoltaic module.

2. The photovoltaic module according to claim 1, characterized in that, Each end of the insulating tape corresponds to an insulating block; along the thickness direction of the photovoltaic module, the projection of the insulating tape overlaps with the projection of the corresponding insulating block.

3. The photovoltaic module according to claim 1, characterized in that, Two sections of insulating tape are provided in the corner area of ​​the photovoltaic module, and the two sections of insulating tape in the corner area do not overlap.

4. The photovoltaic module according to claim 3, characterized in that, Along the thickness direction of the photovoltaic module, the side length of the projection of the insulating block is greater than a set value, so that the projection of the insulating tape overlaps with that of the insulating block while two adjacent segments of the insulating tape do not overlap.

5. The photovoltaic module according to claim 4, characterized in that, The length by which the insulating tape extends to the front or back of the photovoltaic module is a first length; The set value is greater than the first length.

6. The photovoltaic module according to claim 1, characterized in that, There is a gap between the insulating film and the insulating block.

7. The photovoltaic module according to claim 1, characterized in that, The insulating rubber block is made of butyl rubber.

8. The photovoltaic module according to claim 1, characterized in that, The insulating tape is made of one or more of polyolefin, polyethylene terephthalate, or polyimide.

9. A method for manufacturing a photovoltaic module, characterized in that, include: A first insulating film is coated on the first cover plate; wherein, the first insulating film has a notch corresponding to the corner area of ​​the photovoltaic module; Apply an insulating adhesive block to the notch; The side of the first cover plate coated with the first insulating film is attached to the side of the battery string assembly. A second insulating film is coated on the second cover plate; wherein the second insulating film has a notch corresponding to the corner area of ​​the photovoltaic module; The side of the second cover plate coated with the second insulating film is bonded to the other side of the battery string and laminated to obtain an intermediate product of the photovoltaic module. The insulating tape is applied to multiple edges of the intermediate product.

10. The method for preparing a photovoltaic module according to claim 9, characterized in that, In the step of coating the insulating adhesive block in the gap, the distance between the insulating adhesive block and the first insulating film is greater than a set distance, so that there is a gap between the insulating adhesive block and the first insulating film after lamination. And / or, in the process of attaching the insulating tape to the multiple edges of the intermediate product, the projection of the insulating tape overlaps with the projection of the corresponding insulating block, and adjacent segments of the insulating tape do not overlap.

11. A photovoltaic system, characterized in that, include: The photovoltaic module as described in any one of claims 1-8.

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