A photovoltaic module

Abstract

This utility model discloses a photovoltaic module. The photovoltaic module includes at least a front panel glass, a cell array, a back panel glass, and a first and / or second cell component of the cell array, stacked sequentially. A first groove structure is formed on the first surface of the front panel glass, creating a first receiving space between the first groove structure and the back panel glass, where the first cell component is placed. Alternatively, a second groove structure is formed on the first surface of the back panel glass, creating a second receiving space between the second groove structure and the front panel glass, where the second cell component is placed. At least a portion of the inner surface of the first and / or second groove structures is provided with recessed distribution channels. This utility model ensures that the cell components are flat within the groove structure, mitigating or avoiding the problem of bubble appearance on the light-receiving surface of the photovoltaic module caused by the cell components being placed within the groove structure, thereby improving the performance and lifespan of the photovoltaic module.

Description

Technical Field

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

[0002] During the fabrication of photovoltaic (PV) modules, solar cells are prone to shifting during lamination, leading to defective modules and increased production costs. To address this, existing PV modules utilize grooved glass plates for positioning the solar cells. However, placing the cells within these grooves can cause air bubbles to form on the light-receiving surface, affecting the module's performance and lifespan. Furthermore, stress distribution is a crucial factor influencing the performance and lifespan of PV modules. During production and use, various external and internal factors, such as temperature variations, gravity, wind load, and snow load, can cause stress and strain in the modules, impacting their performance and lifespan. Utility Model Content

[0003] This invention provides a photovoltaic module. By providing recessed distribution channels in at least a portion of the inner surface of a groove structure on a glass plate, excess adhesive material enters the distribution channels during the flow of adhesive material. This ensures that the cell components are flat within the groove structure. Simultaneously, since air bubbles can escape from the distribution channels along with the excess adhesive material, this invention can mitigate or avoid the problem of air bubbles appearing on the light-receiving surface of the photovoltaic module due to the cell components being placed within the groove structure on the glass plate, thereby improving the performance and lifespan of the photovoltaic module.

[0004] According to the embodiments of the present utility model, the photovoltaic module includes at least a front glass panel, a battery array, and a back glass panel stacked sequentially, and the battery array includes a first battery cell component and / or a second battery cell component.

[0005] The first surface of the front glass is provided with a first groove structure, and the first groove structure and the back glass form a first receiving space, in which the first battery cell component is placed; and / or, the first surface of the back glass is provided with a second groove structure, and the second groove structure and the front glass form a second receiving space, in which the second battery cell component is placed;

[0006] At least a portion of the inner surface of the first groove structure and / or the second groove structure is provided with a recessed distribution channel.

[0007] Optionally, the distribution channel includes a main channel and multiple sub-channels communicating with the main channel; at least a portion of the main channel is located at the bottom of the groove structure in which it is located, and the multiple sub-channels are spaced apart on both sides of the main channel.

[0008] Optionally, the main channel is parallel to the long side of the battery cell component; and / or, the end of the main channel is arc-shaped or extends to the slot of the groove structure in which it is located; and / or, the end of the sub-channel is arc-shaped or extends to the slot of the groove structure in which it is located.

[0009] Optionally, the first groove structure and / or the second groove structure is a concave platform with a small bottom and a large opening, and the slope angle of the concave platform is 0-30°; and / or, the difference between the length of the bottom of the concave platform and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the width of the bottom of the concave platform and the width of the corresponding battery cell component is 0.5-1mm; and / or, the difference between the length of the opening of the concave platform and the length of the corresponding battery cell component is 1-3mm, and the difference between the width of the opening of the concave platform and the width of the corresponding battery cell component is 1-3mm.

[0010] Optionally, the first surface of the back glass is provided with a first boss structure that fits into the first groove structure of the front glass, and the first groove structure and the first boss structure form a first receiving space; and / or, the first surface of the front glass is provided with a second boss structure that fits into the second groove structure of the back glass, and the second groove structure and the second boss structure form a second receiving space.

[0011] Optionally, the cavity gap between the groove structure and the corresponding boss structure is 0.5-1.0 mm.

[0012] Optionally, the first boss structure and / or the second boss structure are boss bodies with a smaller top and a larger bottom; and / or, the difference between the top length of the boss body and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the top width of the boss body and the width of the corresponding battery cell component is 0.5-1mm; and / or, the difference between the bottom length of the boss body and the length of the corresponding battery cell component is 1-3mm, and the difference between the bottom width of the boss body and the width of the corresponding battery cell component is 1-3mm; and / or, the slope angle of the boss body is 0-30°.

[0013] Optionally, a connecting groove for fixing the interconnecting solder strip is provided between two adjacent first groove structures in the front glass along the extension direction of the battery string, and / or between two adjacent second groove structures in the back glass along the extension direction of the battery string; the interconnecting solder strip is electrically connected to the battery cell component in the corresponding groove structure.

[0014] Optionally, the depth of the connecting groove is less than or equal to the depth of its corresponding groove structure; and / or, the width of the connecting groove is 1 to 1.5 times the width of the interconnecting strip.

[0015] Optionally, the first surface of the front glass is provided with a first groove structure, and the first surface of the back glass is provided with a second groove structure; along the battery string arrangement direction, the first groove structure and the second groove structure are alternately distributed, and the opposite sides of adjacent first groove structures and second groove structures are in the same vertical plane; wherein, the vertical plane is a plane perpendicular to the battery string arrangement direction.

[0016] Optionally, multiple first battery cell components on the front glass are electrically connected by interconnecting solder strips along the battery string extension direction to form a first battery string, and multiple second battery cell components on the back glass are electrically connected by interconnecting solder strips along the battery string extension direction to form a second battery string, wherein the first battery string and / or the second battery string are negative-pitch battery strings or positive-pitch battery strings.

[0017] Optionally, the front and / or back glass panels are provided with busbar grooves for placing the busbar soldering strips.

[0018] Optionally, at least one end of the battery string on the front glass and / or the back glass is connected to a busbar; the busbars corresponding to the ends of two adjacent battery strings on the front glass are electrically connected, and / or, the busbars corresponding to the ends of two adjacent battery strings on the back glass are electrically connected.

[0019] Optionally, the ends of the front glass and the ends of the back glass are connected by a slot and a protrusion.

[0020] Optionally, the second surface of the front glass is provided with an anti-reflective coating; and / or, the second surface of the front glass is provided with a printed layer; and / or, the first surface of the front glass and / or the back glass is an embossed surface; and / or, the planar area between two adjacent groove structures on the first surface of the front glass and / or the back glass is glazed, and the projection of the glazed area in the horizontal plane does not overlap with the projection of the battery cell component in the horizontal plane.

[0021] Optionally, the surface of the first battery cell component facing the back glass is located within the first groove structure or flush with the first surface of the front glass; and / or, the surface of the second battery cell component facing the front glass is located within the second groove structure or flush with the first surface of the back glass.

[0022] Optionally, a front panel adhesive layer is provided between the first battery cell component and the first groove structure, and / or a back panel adhesive layer is provided between the second battery cell component and the second groove structure; an intermediate adhesive layer is provided between the front panel glass and the back panel glass.

[0023] Optionally, the intermediate adhesive layer includes a first intermediate adhesive layer and a second intermediate adhesive layer; the first intermediate adhesive layer corresponds to the first groove structure or the second groove structure; the second intermediate adhesive layer has a hollow area, each hollow area corresponding to a first groove structure or a second groove structure.

[0024] Optionally, the material of the front panel adhesive layer includes an adhesive film or silicone, and the reflectivity, transmittance and refractive index of the front panel adhesive layer are located between the front panel glass and the corresponding battery cell component.

[0025] The above-mentioned technical solution of the utility model has the following advantages or beneficial effects: by setting a recessed distribution channel in at least a part of the inner surface of the groove structure on the glass plate, during the flow of the adhesive material, excess adhesive material will enter the distribution channel. This can ensure that the cell component is flat in the groove structure. At the same time, since air bubbles can run out from the distribution channel with the excess adhesive material, the utility model can alleviate or avoid the problem of air bubbles on the light-receiving surface of the photovoltaic module caused by the cell component being set in the groove structure on the glass plate, thereby improving the performance and lifespan of the photovoltaic module. Attached Figure Description

[0026] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation on it. Wherein:

[0027] Figure 1 This is a cross-sectional schematic diagram of a photovoltaic module in some embodiments of this utility model;

[0028] Figure 2 This is a cross-sectional schematic diagram of a photovoltaic module in some embodiments of the present invention;

[0029] Figure 3 This is a cross-sectional schematic diagram of a photovoltaic module in some other embodiments of this utility model;

[0030] Figure 4 This is a schematic diagram of the distribution channel structure in some embodiments of this utility model;

[0031] Figure 5 yes Figure 4 K-direction view;

[0032] Figure 6 This is a schematic diagram of the distribution channel structure in some embodiments of the present invention;

[0033] Figure 7 This is a schematic diagram of the front glass structure in some embodiments of this utility model;

[0034] Figure 8 Is with Figure 7 A schematic diagram of the structure of the back glass used in conjunction with the front glass;

[0035] Figure 9 yes Figure 7 A schematic diagram of the cross-section of region A along the M direction;

[0036] Figure 10 yes Figure 9A magnified view of a portion of region B in the middle;

[0037] Figure 11 yes Figure 7 A schematic diagram of the cross-section of region A along the N direction;

[0038] Figure 12 yes Figure 11 A magnified view of a portion of region C in the middle;

[0039] Figure 13 This is a schematic diagram of the front glass structure in some embodiments of the present invention;

[0040] Figure 14 Is with Figure 13 A schematic diagram of the structure of the back glass used in conjunction with the front glass;

[0041] Figure 15 This is a schematic diagram of the connection of the busbar solder strip in an optional embodiment of this utility model;

[0042] Figure 16 This is a schematic diagram of the glazing area in an optional embodiment of this utility model;

[0043] Figure 17 This is a schematic diagram of the front glass structure in some other embodiments of this utility model.

[0044] The attached figures are labeled as follows:

[0045] 11-First battery cell component; 12-Second battery cell component; 20-Front panel glass; 201-First surface of front panel glass; 202-Second surface of front panel glass; 203-Enclosure; 21-Protrusion; 30-Back panel glass; 301-First surface of back panel glass; 302-Second surface of back panel glass; 31-Slot; 41-First groove structure; 42-Second groove structure; 50-Distribution channel; 51-Main channel; 52-Sub-channel; 61-First boss structure; 62-Second boss structure; 70-Connecting groove; 81-Interconnecting solder strip; 82-Combine groove; 821-Conductive material; 91-Front panel adhesive layer; 92-Back panel adhesive layer; 93-Intermediate adhesive layer; 931-First intermediate adhesive layer; 932-Second intermediate adhesive layer; θ-Inclined angle; T-Cavity gap; X-Battery string extension direction; Y-Battery string arrangement direction. Detailed Implementation

[0046] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These embodiments should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0047] It should be noted that the terms "front," "back," "upper," "lower," "inner," "outer," "side," and "end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0048] Unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The photovoltaic module of this utility model includes a glass plate and a solar cell component. The glass plate has a groove structure, and the solar cell component is disposed in the groove structure. At least a portion of the inner surface of the groove structure has a recessed distribution channel.

[0050] Figure 1 This is a cross-sectional schematic diagram of a photovoltaic module in some embodiments of this utility model. In these embodiments, the Y-direction refers to the direction of the battery string arrangement. Figure 1In the optional embodiment shown, the photovoltaic module includes a first cell component 11 and a second cell component 12; a first groove structure 41 is provided on the first surface 201 of the front glass 20, forming a first accommodating space between the first groove structure 41 and the back glass 30, and the first cell component 11 is placed in the first accommodating space; a second groove structure 42 is provided on the first surface 301 of the back glass 30, forming a second accommodating space between the second groove structure 42 and the front glass 20, and the second cell component 12 is placed in the second accommodating space. In this embodiment of the present invention, recessed distribution channels 50 may be provided only in at least a portion of the inner surface of the first groove structure 41 or the second groove structure 42, or recessed distribution channels 50 extending to the opening of the groove structure may be provided simultaneously in at least a portion of the inner surface of the first groove structure 41 and the second groove structure 42.

[0051] Figure 2 This is a cross-sectional schematic diagram of a photovoltaic module in some embodiments of this utility model. Figure 2 In the optional embodiment shown, the back glass 30 does not have a second groove structure 42, and correspondingly, the photovoltaic module does not include a second cell component 12. Specifically, the photovoltaic module includes a first cell component 11; the first surface 201 of the front glass 20 is provided with a first groove structure 41, and the first groove structure 41 and the back glass 30 form a first receiving space, in which the first cell component 11 is placed; at least a portion of the inner surface of the first groove structure 41 is provided with a recessed distribution channel 50 extending to the opening of the groove structure.

[0052] Figure 3 This is a cross-sectional schematic diagram of a photovoltaic module in some other embodiments of this utility model. Figure 3 In the optional embodiment shown, the front glass 20 does not have a first groove structure 41, and correspondingly, the photovoltaic module does not include a first cell component 11. Specifically, the photovoltaic module includes a second cell component 12; the first surface 301 of the back glass 30 is provided with a second groove structure 42, and the second groove structure 42 and the front glass 20 form a second receiving space, in which the second cell component 12 is placed; at least a portion of the inner surface of the second groove structure 42 is provided with a recessed distribution channel 50 extending to the opening of the groove structure.

[0053] In this invention, the front glass panel 20 has a first surface 201 and a second surface 202, the second surface 202 of which is the sun-facing side of the front glass panel 20, and the first surface 201 of which is the backlight side of the front glass panel 20; the back glass panel 30 has a first surface 301 and a second surface 302, the first surface 301 of which is the sun-facing side of the back glass panel 30, and the second surface 302 of which is the backlight side of the back glass panel 30.

[0054] Stress distribution in photovoltaic (PV) modules is a crucial factor affecting their performance and lifespan. During the production and use of PV modules, various external and internal factors, such as temperature changes, gravity, wind load, and snow load, can cause stress and strain in the modules. Typically, the glass panel of a PV module bears compressive stress. When the glass panel's rigidity is insufficient, it can lead to mechanical load reliability issues, causing the glass panel to crack and subsequently resulting in microcracks in the solar cells. Gases in the air can also penetrate the PV module along these cracks, increasing the risk of power degradation or even failure. Furthermore, temperature changes can also cause stress in the PV module's encapsulation materials, such as the shrinkage and aging of EVA (ethylene-vinyl acetate copolymer). This invention addresses this issue by incorporating a groove structure within the glass panel to avoid stress caused by module deformation, thereby increasing the glass panel's rigidity. This effectively reduces stress distribution in the PV module, lowers the risk of microcracks and fragmentation, and improves the module's performance and lifespan.

[0055] The solar cell components are mounted within a grooved structure on a glass plate using adhesive material. This grooved structure is prone to air bubble residue. This invention addresses this issue by creating recessed distribution channels in at least a portion of the inner surface of the grooved structure on the glass plate. During the lamination process, excess adhesive material flows into these distribution channels, ensuring the stability of the laminated layers and preventing accumulation in any one area. This not only ensures stable placement of the solar cell components but also maintains the flatness of the side of the components away from the grooved structure, reducing the likelihood of tilting. This reduces stress during the assembly of the front and back glass panels, significantly lowering the risk of microcracks and fragmentation of the solar cells during photovoltaic module strain, thus improving the performance and lifespan of the photovoltaic module. Furthermore, the distribution channels 50 can extend to the opening of the grooved structure, allowing air bubbles to escape with excess adhesive material. Therefore, this invention mitigates or avoids the problem of air bubbles appearing on the light-receiving surface of the photovoltaic module due to the solar cell components being mounted within the grooved structure on the glass plate, further improving the performance and lifespan of the photovoltaic module.

[0056] There are various types of solar cell components. A solar cell component can be a single solar cell, or a sub-string of multiple solar cells connected in series and / or parallel. For example, a sub-string of solar cells can be formed by arranging several solar cells together. The solar cells can be individually welded or connected in series using solder ribbons, thus welding the front electrode of one solar cell to the back electrode of the next solar cell. Multiple solar cells can be connected in series to form a sub-string. The solar cells can be monocrystalline or polycrystalline. One or more solar cell components can form a solar string through series and / or parallel connections. Multiple solar cell components extend continuously through electrical connections, and the direction of extension is called the extension direction of the solar string, i.e., the X-direction in this invention. The welded solar strings can be arranged and welded to busbars. The busbar leads can be connected in series with bypass diodes and other electronic devices in the junction box to bring out the positive and negative terminals. A photovoltaic module can contain multiple solar strings, and the direction in which the multiple solar strings are arranged is called the solar string arrangement direction, i.e., the Y-direction in this invention.

[0057] The dispensing channel 50 in this invention is a structure that is recessed from the inner surface of the groove structure into the groove structure. Its specific location can be set according to actual needs, for example, it can be recessed from the periphery of the groove structure, or from the bottom of the groove structure, or simultaneously from both the periphery and the bottom of the groove structure. The inward recessing involved in this invention refers to a recess in a direction away from the center of the groove structure. The route of the recess can be selectively set, for example, along a straight line, a curve, or a broken line. Exemplarily, the dispensing channel is set as a radial channel, such as a cross-shaped radial channel or a star-shaped radial channel.

[0058] In this invention, the number of distribution channels 50 can be set to one or more according to actual conditions. Furthermore, the structural form of the distribution channels 50 can also be selectively set. For example, the distribution channel 50 can be a long, narrow channel, with multiple intersecting or parallel distribution channels 50 arranged within a groove structure. As another example, the distribution channel 50 includes a main channel 51 and multiple branch channels 52 communicating with the main channel 51; at least a portion of the main channel 51 is located at the bottom of the groove structure it occupies, and the multiple branch channels 52 are spaced apart on both sides of the main channel 51. Figure 4 This is a schematic diagram of the distribution channel structure in some embodiments of this utility model. Figure 5 yes Figure 4 A K-direction view. In Figure 4 and Figure 5In the optional embodiment shown, the distribution channel 50 in the first groove structure 41 includes a main channel 51 and five sub-channels 52 communicating with the main channel 51. The main channel 51 is disposed at the bottom of the groove of the first groove structure 41, and the five sub-channels 52 communicate with the main channel 51 respectively. Each sub-channel 52 extends from the main channel 51 to both sides of the main channel 51 along the groove wall of the first groove structure 41 to the first surface 201 of the front panel glass 20, that is, to the groove opening of the first groove structure 41. Figure 6 This is a schematic diagram of the distribution channel structure in some embodiments of the present invention. Figure 6 In the optional embodiment shown, the distribution channel 50 in the first groove structure 41 includes a main channel 51 and three sub-channels 52 communicating with the main channel 51. The main channel 51 is disposed at the bottom of the groove of the first groove structure 41, and the three sub-channels 52 are respectively communicating with the main channel 51. Each sub-channel 52 extends from the main channel 51 to both sides of the main channel 51. The main channel 51 and the three sub-channels 52 are all disposed at the bottom of the groove of the first groove structure 41.

[0059] When the distribution channel 50 includes a main channel 51 and a sub-channel 52, the extension direction of the main channel 51 relative to the battery string component and the extension direction of the sub-channel 52 relative to the battery string component can be selectively set. In an optional embodiment of this invention, the main channel 51 is parallel to the long side direction of the battery cell component, such as... Figure 4-6 As shown, this is to ensure more uniform dispersion of the adhesive material. Of course, the extension direction of the main channel 51 relative to the battery string component and the extension direction of the branch channel 52 relative to the battery string component can also be configured in other ways. For example, the main channel 51 can be parallel or nearly parallel to the diagonal direction of the battery cell component. In this embodiment, the long side direction of the battery cell component is the Y direction, and the short side direction of the battery cell component is the X direction.

[0060] The ends of the main channel 51 and / or the sub-channel 52 can extend to the first surface of the glass plate they are located on, that is, the main channel 51 and / or the sub-channel 52 extend to the groove opening of the groove structure they are located on. In other words, the main channel 51 and / or the sub-channel 52 on the first groove structure 41 can extend to the first surface 201 of the front glass 20, and the main channel 51 and / or the sub-channel 52 on the second groove structure 42 can extend to the first surface 301 of the back glass 30. When the ends of the main channel 51 and / or the sub-channel 52 do not extend to the first surface of the glass plate they are located on, the ends of the main channel 51 and / or the sub-channel 52 can be arc-shaped, rectangular, etc. Figure 6 In the optional embodiment shown, the ends of the main channel 51 and the sub-channel 52 are arc-shaped. By setting the arc-shaped ends, the smoothness of the adhesive material flow process can be reduced, and turbulence caused by the adhesive material suddenly stopping when it reaches the end of the distribution channel can be avoided.

[0061] In this embodiment of the invention, the area of ​​the glass plate opposite the position of the groove structure can be the first surface of the opposite glass plate, such as... Figure 1-3 As shown; the opposite glass plate area corresponding to the groove structure can also be a boss structure that protrudes outward from the first surface of the opposite glass plate. For example, the first surface 301 of the back glass 30 is provided with a first boss structure 61 that fits into the first groove structure 41 of the front glass 20. The first groove structure 41 and the first boss structure 61 form a first receiving space, and the first battery cell component 11 is disposed in the first receiving space. Figure 7 This is a schematic diagram of the front glass structure in an optional embodiment of this utility model. Figure 8 Is with Figure 7 A schematic diagram of the structure of the back glass used in conjunction with the front glass. Figure 7 and Figure 8 In the optional embodiment shown, a plurality of first groove structures 41 are provided in the front glass 20, and a plurality of first boss structures 61 that fit into the first groove structures 41 are provided in the back glass 30. No second groove structure 42 is provided on the back glass 30. Correspondingly, no second boss structure 62 is provided on the front glass 20, and the photovoltaic module does not include a second cell component 12. Along the Y direction, the upper and lower halves of the first surface 201 of the front glass 20 each contain six columns of first groove structures 41. Correspondingly, the upper and lower halves of the first surface 301 of the back glass 30 each contain six columns of first boss structures 61, representing that the upper and lower halves of the photovoltaic module each contain six cell strings. Along the X direction, every nine first groove structures on the first surface of the front glass 20 are connected, representing that each cell string in the photovoltaic module contains nine cell components.

[0062] In this embodiment of the present invention, the first surface 201 of the front panel glass 20 may be provided with a second boss structure 62 that fits into the second groove structure 42, and the second groove structure 42 and the second boss structure 62 form the second accommodating space, and the second battery cell component 12 is disposed in the second accommodating space. In practical applications, when the front glass 20 is provided with a first groove structure 41 and the back glass 30 is provided with a second groove structure 42, the opposite glass plate areas at the corresponding positions of the first groove structure 41 and the second groove structure 42 can both be protruding structures that bulge outward from the first surface of the opposite glass plate. That is, the first surface 301 of the back glass 30 is provided with a first protruding structure 61 that fits into the first groove structure 41, and the first groove structure 41 and the first protruding structure 61 form a first accommodating space. The first battery cell component 11 is disposed in the first accommodating space. The first surface 201 of the front glass 20 is provided with a second protruding structure 62 that fits into the second groove structure 42, and the second groove structure 42 and the second protruding structure 62 form a second accommodating space. The second battery cell component 12 is disposed in the second accommodating space. By setting a boss structure that fits into the groove structure, the front glass 20 and the back glass 30 can be aligned during lamination through the matching design of the groove structure and the boss structure. The interlocking structure can also further improve the deformation resistance of the photovoltaic module, thereby improving the process yield of the photovoltaic module.

[0063] There is a cavity gap between the bottom of the groove structure and the top of the corresponding boss structure to accommodate the battery cell components. Figure 9 yes Figure 7 A schematic diagram of the cross-section of region A along the M direction. Figure 10 yes Figure 9 A magnified view of a portion of region B. Figure 11 yes Figure 7 A schematic diagram of the cross-section of region A along the N direction. Figure 12 yes Figure 11 A magnified view of a portion of region C. Figure 9-12 In this context, "T" represents the cavity clearance, which is slightly larger than the thickness of the battery cell component to prevent damage. The value of the cavity clearance can be set according to actual needs. The depth of the groove structure can also be set according to actual needs. In an optional embodiment, the cavity clearance between the groove structure and the corresponding boss structure is 0.5-1.0 mm.

[0064] The groove structure is a structure that is recessed inward from the first surface, such as... Figure 1-4 As shown in Figures 9-12 and 16, the groove structure can also be formed as follows: barriers are set on the surface of the glass plate, and recesses for placing the battery cell components are formed between the barriers, i.e., a groove structure. The material of the barriers can be selectively chosen, such as a polymer material. Figure 17This is a schematic diagram of the front glass structure in some other embodiments of this utility model, such as... Figure 17 As shown, a baffle 203 is provided on the first surface of the front glass 20, forming a first groove structure for placing the first battery cell component 11. It is understood that the groove structure on the back glass 30 can also be formed in the same way as the front glass 20. The groove structure can be a cylindrical structure, a square column structure, etc., where the groove opening size and the groove bottom size are the same. For example, in... Figure 1-3 In the alternative embodiment shown, the cross-sectional shape of the groove structure is rectangular along the direction perpendicular to the extension direction X of the battery string.

[0065] The groove structure can also be a concave platform with a small bottom and a large opening, that is, the first groove structure 41 and / or the second groove structure 42 are concave platforms with a small bottom and a large opening, such as a frustum or a truncated cone. Typically, when the battery cell component is rectangular, the concave platform is set as a frustum. For example, in... Figure 4-5 In the optional embodiments shown in 7-12, the recessed platform is configured as a frustum. Along the direction perpendicular to the extension direction X of the battery string, the cross-sectional shape of the groove structure is trapezoidal, and the side length of the trapezoid at the groove opening is greater than the side length of the trapezoid at the groove bottom. In this invention, the portion between the bottom surface and the cross-section of a cone is called a frustum; the portion between the bottom surface and the cross-section of a pyramid is called a frustum; and the portion between the bottom surface and the cross-section of a cone is called a frustum. By configuring the groove structure as a recessed platform with a small bottom and a large opening, not only is the structural rigidity of the glass plate improved, but the alignment of the front and back glass during the lamination process is also achieved, facilitating precise control of the cell spacing and string spacing of the battery components, further improving the process yield of the photovoltaic module. The slope angle of the recessed platform can be selectively set. However, in order to maximize the effective power generation area of ​​photovoltaic modules, the slope angle should not be too large. For example, the slope angle of the concave platform should be 0-30°. Figure 10 yes Figure 9 A magnified view of a portion of region B. Figure 11 yes Figure 7 A schematic diagram of the cross-section of region A along the N direction. Figure 12 yes Figure 11 A magnified view of a portion of region C. Figure 10 and Figure 12 In this context, θ represents the slope angle of the concave platform. In an optional embodiment, the slope angle θ of the concave platform is 0-30°.

[0066] The side of the recessed platform closest to the first surface of the glass plate it is attached to is the groove, and the side furthest from the first surface of the glass plate it is attached to is the groove bottom. Typically, the dimensions of the groove opening and bottom of the recessed platform are larger than the dimensions of the corresponding solar cell component to avoid damaging the solar cell component. The difference between the dimensions of the top and bottom of the recessed platform and the dimensions of the corresponding solar cell component can be optionally set. In an optional embodiment, the difference between the length of the groove bottom of the recessed platform and the length of the corresponding solar cell component is 0.5-1 mm, and the difference between the width of the groove bottom of the recessed platform and the width of the corresponding solar cell component is 0.5-1 mm. Here, the length refers to the dimension along the long side of the solar cell component, and the width refers to the dimension along the short side of the solar cell component. The difference between the groove opening dimension of the recessed platform and the dimensions of the corresponding solar cell component is greater than the difference between the groove bottom dimension of the recessed platform and the dimensions of the corresponding solar cell component. For example, the difference between the groove opening length of the recessed platform and the length of the corresponding solar cell component is 1-3 mm, and the difference between the groove opening width of the recessed platform and the width of the corresponding solar cell component is 1-3 mm.

[0067] The boss structure is a structure that protrudes outward from the first surface, such as a cylindrical structure or a square column structure. In an optional embodiment, the boss structure is a platform body with a smaller top and a larger bottom, that is, the first boss structure 61 and / or the second boss structure 62 are platform bodies with a smaller top and a larger bottom. In this utility model, the boss body can be a frustum or a truncated cone structure, etc. Typically, when the battery cell component is rectangular, the boss body is set as a frustum, such as... Figure 4-6 As shown.

[0068] The side of the protruding platform closest to the first surface of the glass plate it is situated on is the bottom, and the side furthest from the first surface of the glass plate it is situated on is the top. Typically, the dimensions of the top and bottom of the protruding platform are larger than the dimensions of the corresponding solar cell component to avoid damaging the solar cell component. The difference between the dimensions of the top and bottom of the protruding platform and the dimensions of the corresponding solar cell component can be optionally set. In an optional embodiment, the difference between the length of the top of the protruding platform and the length of the corresponding solar cell component is 0.5-1 mm, and the difference between the width of the top of the protruding platform and the width of the corresponding solar cell component is 0.5-1 mm. Here, the length refers to the dimension along the long side of the solar cell component, and the width refers to the dimension along the short side of the solar cell component. When the protruding platform is smaller at the top and larger at the bottom, the difference between the top dimension of the protruding platform and the dimensions of the corresponding solar cell component is greater than the difference between the bottom dimension of the protruding platform and the dimensions of the corresponding solar cell component. For example, the difference between the bottom length of the protruding platform and the length of the corresponding solar cell component is 1-3 mm, and the difference between the bottom width of the protruding platform and the width of the corresponding solar cell component is 1-3 mm.

[0069] The first boss structure 61 corresponds to the first groove structure 41, and the second boss structure 62 corresponds to the second groove structure 42. When the first groove structure 41 and / or the second groove structure 42 are concave pits with small bottoms and large openings, the first boss structure 61 and / or the second boss structure 62 are bosses with small tops and large bottoms, and the side of the boss is a slope. Figure 10 yes Figure 9 A magnified view of a portion of region B. Figure 11 yes Figure 7 A schematic diagram of the cross-section of region A along the N direction. Figure 12 yes Figure 11 A magnified view of a portion of region C. Figure 10 and Figure 12 In this context, φ represents the slope angle of the boss. In optional embodiments, the slope angle φ of the boss is 0-30°. By setting the side of the boss as a slope, not only is the structural rigidity of the glass plate improved, but the alignment of the front and back glass during the lamination process is also achieved, facilitating precise control of the cell spacing and string spacing of the solar cell components, further improving the process yield of the photovoltaic module. However, to maximize the effective power generation area of ​​the photovoltaic module, the slope angle should not be too large. The sloped fit between the groove structure and the protrusion structure acts as a guide, allowing the solar cell components, interconnecting solder strips, and adhesive materials to be placed between the cavities formed by the groove structure and the protrusion structure. This interlocking structure further enhances the deformation resistance of the photovoltaic module.

[0070] Two adjacent battery cell components along the battery string extension direction can be electrically connected via interconnecting solder strips. In an optional embodiment of this invention, a connecting groove 70 for fixing the interconnecting solder strip 81 is provided between two adjacent first groove structures 41 along the battery string extension direction in the front panel glass 20, such as... Figure 7 as well as Figure 9-10 As shown. Correspondingly, a connecting groove 70 for positioning the interconnecting ribbon 81 can also be provided between two adjacent second groove structures 42 along the battery string extension direction in the back glass 30. The interconnecting ribbon 81 is electrically connected to the battery cell component in the corresponding groove structure. The interconnecting ribbon 81 can be positioned by providing the connecting groove 70. The interconnecting ribbon 81 is laid on the surface of the battery cell component and passes through the connecting groove 70 to realize the series connection between adjacent battery cell components. As an example, the first battery cell component 11 is placed in the first groove structure 41. The surface of the first battery cell component 11 is lower than the first surface 201 of the front glass 20. There is a height difference between the interconnecting ribbon 81. During lamination, the lamination difference of the interconnecting ribbon 81 can easily cause the edge of the battery cell to break. By providing the connecting groove 70, the interconnecting ribbon 81 placed in the connecting groove 70 is kept horizontal, avoiding the edge of the battery cell from breaking during lamination.

[0071] The width of the connecting groove 70 can be selectively set. In some alternative embodiments, the width of the connecting groove 70 is greater than the width of the interconnect solder ribbon 81, for example, the width of the connecting groove 70 is 1-1.5 times the width of the interconnect solder ribbon 81, so that the interconnect solder ribbon 81 will not be squeezed when it is laid flat through the connecting groove 70. The width of the connecting groove 70 can also be less than the width of the interconnect solder ribbon 81. In this case, the interconnect solder ribbon 81 can pass through the connecting groove vertically. Since the thickness of the interconnect solder ribbon 81 is usually much smaller than its width, the interconnect solder ribbon 81 will not be squeezed when it passes through the connecting groove 70 vertically.

[0072] The width of the connecting groove 70 can be selectively set to allow the interconnecting solder ribbon 81 to pass through. Generally, the greater the depth or width of the connecting groove, the easier it is for the interconnecting solder ribbon 81 to pass through the connecting groove 70. However, the depth and width of the connecting groove should not be too large. If the width of the connecting groove 70 is too large, it will reduce the effective power generation area of ​​the glass panel and affect the performance of the photovoltaic module. If the depth of the connecting groove is excessive, it will reduce the mechanical strength of the glass panel and affect the mechanical strength of the photovoltaic module, which may in turn affect the performance and lifespan of the photovoltaic module. In some optional embodiments, the depth of the connecting groove 70 is less than or equal to the depth of its corresponding groove structure.

[0073] In this embodiment of the invention, the battery cell component can be provided only on one side of the glass plate. For example: in Figure 2 In the illustrated embodiment, a first groove structure 41 is provided on the first surface 201 of the front glass 20, forming a first accommodating space between the first groove structure 41 and the back glass 30. The first solar cell component 11 is placed within the first accommodating space. No second groove structure 42 is provided on the back glass 30, and correspondingly, the photovoltaic module does not include a second solar cell component 12; or, in Figure 3 In the embodiment shown, the first surface 301 of the back glass 30 is provided with a second groove structure 42, and the second groove structure 42 and the front glass 20 form a second accommodating space. The second battery cell component 12 is placed in the second accommodating space. The first groove structure 41 is not provided on the front glass 20, and correspondingly, the photovoltaic module does not include the first battery cell component 11.

[0074] This invention can also provide battery cell components on the front glass 20 and the back glass 30 respectively, for example, in Figure 1In the illustrated embodiment, the photovoltaic module includes a first cell component 11 and a second cell component 12; a first groove structure 41 is provided on the first surface 201 of the front glass 20, and the first groove structure 41 and the back glass 30 form a first accommodating space, in which the first cell component 11 is placed; a second groove structure 42 is provided on the first surface 301 of the back glass 30, and the second groove structure 42 and the front glass 20 form a second accommodating space, in which the second cell component 12 is placed. Figure 1 The first groove structure 41 and the second groove structure 42 are alternately distributed along the battery string arrangement direction, that is, the distribution along the battery string arrangement direction is: ..., first groove structure 41, second groove structure 42, first groove structure 41, second groove structure 42, ... In this case, there is one second groove structure 42 between two adjacent first groove structures 41, and one first groove structure 41 between two adjacent second groove structures 42. Those skilled in the art can also use other alternating distribution methods, for example, the distribution along the battery string arrangement direction is: ..., one or more first groove structures 41, one or more second groove structures 42, one or more first groove structures 41, one or more second groove structures 42, ... In this case, one or more first groove structures 41 can be regarded as a group, and one or more second groove structures 42 can also be regarded as a group, with one group of first groove structures and one group of second groove structures alternating.

[0075] Along the direction of the battery string arrangement, the distance between the opposite sides of two adjacent groove structures can be selectively set. The smaller the distance, the larger the effective power generation area of ​​the photovoltaic module. In traditional photovoltaic modules, a certain string spacing is usually required between battery strings to prevent short circuits. However, this string spacing reduces the effective power generation area of ​​the photovoltaic module and affects its power generation efficiency. In special BIPV (Building Integrated Photovoltaics) modules, a string spacing-free structure design is required. In an optional embodiment of this invention, along the direction of the battery string arrangement, the opposite sides of adjacent first groove structures 41 and second groove structures 42 are on the same vertical plane, such as... Figure 1 As shown. In this embodiment of the invention, the vertical plane is a plane perpendicular to the direction of the battery string arrangement. This invention optimizes the glass plate structure by setting groove structures on the front and back glass plates respectively. Adjacent battery strings are then prefabricated in the groove structures of the upper and lower glass plates, and then stacked to achieve a string-space-free arrangement. This increases the strength of the photovoltaic module while improving its effective power generation area, thus enhancing its power generation efficiency.

[0076] In this invention, a battery string formed by electrically connecting multiple first battery cell components 11 along the battery string extension direction on the front glass 20 via interconnecting solder strips 81 is called a first battery string, and a battery string formed by electrically connecting multiple second battery cell components 12 along the battery string extension direction on the back glass 30 via interconnecting solder strips 81 is called a second battery string. The first and / or second battery strings can be positively spaced battery strings, meaning that the edges of adjacent battery cell components in the battery string do not overlap or adhere (i.e., do not directly contact each other) along the battery string extension direction. Using positively spaced battery strings facilitates the connection between adjacent battery cell components. The first and / or second battery strings can also be unspaced battery strings, meaning that the edges of adjacent battery cell components in the battery string adhere to each other along the battery string extension direction. Using unspaced battery strings can effectively reduce the ineffective area of ​​the glass panel and improve the performance of the photovoltaic module. The first and / or second battery strings can also be negatively spaced battery strings, meaning that at least a portion of the edges of two adjacent battery cell components in the battery string overlap (at least a portion of the overlap exists in the thickness direction of the battery cell components) together. Using negative-pitch battery strings can further reduce the ineffective area of ​​the glass panel and improve the performance of photovoltaic modules.

[0077] The current from the battery string flows onto the busbar, which is typically a tin-plated copper flat strip located in the middle or at both ends of the battery string. The interconnecting strips at both ends of the battery string are soldered onto the busbar. In an optional embodiment of this invention, the front glass 20 and / or the back glass 30 are provided with busbar grooves 82 for placing the busbar. Figure 13 This is a schematic diagram of the front glass structure in some embodiments of the present invention. Figure 13 In the optional embodiment shown, a plurality of first battery cell components 11 are provided in the front glass 20. Along the Y direction, the first surface 201 of the front glass 20 includes two battery strings. Along the X direction, each battery string of the front glass 20 includes six first battery cell components 11. The front glass 20 is provided with busbar grooves 82 for placing busbar solder strips at positions corresponding to the ends and the middle of the battery strings. Figure 14 Is with Figure 13 A structural diagram of the back glass used in conjunction with the front glass in the diagram. Figure 14 In the optional embodiment shown, a plurality of second battery cell components 12 are disposed in the back glass 30. Along the Y direction, the first surface 301 of the back glass 30 includes two battery strings; along the X direction, each battery string of the back glass 30 includes six second battery cell components 12. Busbar grooves 82 for placing busbar solder strips are respectively disposed on the back glass 30 at positions corresponding to the ends and middle of the battery strings. This invention, by providing busbar grooves 82, facilitates the positioning of the busbar solder strips and prevents displacement of the busbar solder strips during lamination.

[0078] At least one end of the battery string on the front glass 20 and / or the back glass 30 is connected to a busbar to collect the current in the corresponding battery string. For example... Figure 13 and 14 As shown, busbars are provided at the middle and both ends of the battery string. The busbars corresponding to the ends of adjacent battery strings on the front glass 20 are electrically connected, and / or the busbars corresponding to the ends of adjacent battery strings on the back glass 30 are electrically connected to achieve current convergence. Exemplarily, the ends of the busbars corresponding to the ends of adjacent battery strings are stacked together and then welded together, or the busbars corresponding to the ends of adjacent battery strings are fixed using conductive materials such as conductive adhesive. Any method that enables electrical connection between the busbars corresponding to the ends of adjacent battery strings is acceptable and is not limited here. Figure 15 This is a schematic diagram of the connection of the busbar solder strip in an optional embodiment of this utility model. Figure 15 The two solar cell components are the ends of two cell strings in the backsheet glass. The ends of the two cell strings are electrically connected to busbars 82 via interconnecting ribbons 81, and the corresponding busbars 82 of the two cell strings are electrically connected via conductive material 821. By electrically connecting the corresponding busbars at the ends of two adjacent cell strings in the glass plate, the connection efficiency between the end of the cell string and the busbar can be improved, thereby increasing the production efficiency of the photovoltaic module.

[0079] The materials of the front glass 20 and the back glass 30 include tempered glass, semi-tempered glass, etc., and the light transmittance of the front glass 20 can be greater than that of the back glass 30. The first surface of the front glass 20 and / or the back glass 30 can be an embossed surface to increase the amount of sunlight irradiated onto the solar cell components by utilizing a patterned light-trapping structure, thereby improving the utilization rate of sunlight by the solar cell components and thus improving the power generation efficiency of the photovoltaic module.

[0080] The second surface 202 of the front glass 20 faces outwards towards the sun. An anti-reflective coating (also called an anti-reflective film) can be applied to the second surface 202 of the front glass 20 to reduce the reflection of sunlight by the front glass 20 and improve the power generation efficiency of the photovoltaic module. Various types of anti-reflective coatings can be used, such as AR anti-reflective films. The second surface 202 of the front glass 20 can also have a printed layer; printing different colored patterns can further reduce the reflection of sunlight by the front glass 20 and improve the power generation efficiency of the photovoltaic module.

[0081] The planar areas between two adjacent recessed structures on the first surface of the front glass 20 and / or the back glass 30 are glazed, and the projection of the glazed area onto the horizontal plane does not overlap with the projection of the battery cell component onto the horizontal plane. The planar area referred to here is an area on the first surface that does not correspond to either the first recessed structure 41 or the second recessed structure 42, i.e., the projection of the glazed area onto the horizontal plane does not overlap with the projection of the battery cell component onto the horizontal plane. Figure 1 Taking the optional embodiment shown as an example, the front glass 20 and the back glass 30 are respectively provided with groove structures for placing battery cell components. The planar area on the front glass refers to the area on the front glass 20 that does not correspond to the first groove structure 41 on the front glass 20 nor to the second groove structure 42 on the back glass. The planar area on the back glass 30 refers to the area on the back glass 30 that does not correspond to the first groove structure 41 on the front glass 20 nor to the second groove structure 42 on the back glass 30. Figure 2 Taking the optional embodiment shown as an example, the front glass 20 is provided with a first groove structure 41 for placing the first battery cell component 11, and the back glass 30 is not provided with a second groove structure 42 for placing the second battery cell component 12. The planar area on the front glass 20 refers to the area on the front glass 20 that does not correspond to the first groove structure 41, and the planar area on the back glass 30 refers to the area on the back glass 30 that does not correspond to the first groove structure 41 on the front glass 20. Figure 3 Taking the optional embodiment shown as an example, the front glass 20 does not have a first groove structure 41 for placing the first battery cell component 11, and the back glass 30 has a second groove structure 42 for placing the second battery cell component 12. The planar area on the front glass 20 refers to the area on the front glass 20 that does not correspond to the second groove structure 42, and the planar area on the back glass 30 refers to the area on the back glass 30 that does not correspond to the second groove structure 42. Figure 16 This is a schematic diagram of the enamel-plated area in an optional embodiment of this utility model. Figure 16 In the alternative embodiment shown, the first battery cell components 11 in the two first groove structures 41 on the front glass 20 are connected in series by interconnecting solder strips 81, and the area E between the two adjacent first groove structures 41 along the battery string extension direction X on the first surface of the front glass 20 is glazed.

[0082] By glazing the planar area between two adjacent groove structures on the first surface of the front glass 20 and / or the back glass 30, inter-cell shading between cell components can be achieved, preventing the cell components from affecting each other. By ensuring that the projection of the glazed area on the horizontal plane does not overlap with the projection of the cell component on the horizontal plane, the glazed area can be prevented from shading the cell component, thus preventing a reduction in the power generation efficiency of the photovoltaic module due to the shading of the cell component.

[0083] The front glass panel 20 and the back glass panel 30 can be bonded together using an adhesive material. For example, the front glass panel 20, the adhesive film, and the back glass panel 30 can be placed sequentially and then laminated. During lamination, the adhesive film helps to fix the front glass panel 20 and the back glass panel 30. In an optional embodiment, the ends of the front glass panel 20 and the ends of the back glass panel 30 are connected by a groove and a protrusion. Figure 1-3 As shown, a protrusion 21 is provided at the end of the front glass panel 20, and a slot 31 is provided at the end of the back glass panel 30. Those skilled in the art can adjust the positions of the slot 31 and the protrusion 21 as needed. For example, a slot 31 can be provided at the end of the front glass panel 20, and a protrusion 21 at the end of the back glass panel 30; or, for another example, a slot 31 can be provided at one end of the front glass panel 20, and a protrusion 21 at the other end, with a protrusion 21 and a slot 31 respectively provided at the two corresponding ends of the back glass panel 30. The cooperation of the protrusion 21 and the slot 31 further increases the bonding strength and stability between the front glass panel 20 and the back glass panel 30, ensures flatness during assembly, and helps achieve a gap-free effect.

[0084] In this embodiment of the present invention, the depth of the first groove structure 41 can be greater than the thickness of the first battery cell component 11, that is, the surface of the first battery cell component 11 away from the bottom of the groove in the first groove structure 41 is located within the first groove structure 41. Alternatively, the depth of the first groove structure 41 can be equal to the thickness of the first battery cell component 11, that is, the surface of the first battery cell component 11 away from the bottom of the groove in the first groove structure 41 is flush with the first surface of the front panel glass 20. Similarly, the depth of the second groove structure 42 can be greater than the thickness of the second battery cell component 12, that is, the surface of the second battery cell component 12 away from the bottom of the groove in the second groove structure 42 is located within the second groove structure 42, and the depth of the second groove structure 42 can also be equal to the thickness of the second battery cell component 12, that is, the surface of the second battery cell component 12 away from the bottom of the groove in the second groove structure 42 is flush with the first surface of the back panel glass 30. By aligning the surface of the cell component away from the bottom of the groove structure with the first surface of the glass plate it is located on the same plane, or within the groove structure, stress generation can be reduced when the front and back glass panels are combined to form a photovoltaic module. This significantly reduces the risk of microcracks and fragmentation of the cells during the strain process of the photovoltaic module, thereby improving the performance and lifespan of the photovoltaic module.

[0085] In this embodiment of the invention, a front panel adhesive layer can be provided between the front panel glass 20 and the cell components, and a back panel adhesive layer can be provided between the cell components and the back panel glass 30. That is, the photovoltaic module includes a front panel glass 20, a front panel adhesive layer, a cell array composed of multiple first cell components and multiple second cell components, a back panel adhesive layer, and a back panel glass 30. In an optional embodiment of the invention, a front panel adhesive layer 91 can also be provided between the first cell component 11 and the first groove structure 41, and / or a back panel adhesive layer 92 can be provided between the second cell component 12 and the second groove structure 42, and an intermediate adhesive layer 93 can be provided between the front panel glass 20 and the back panel glass 30. Figure 1 In the optional embodiment shown, a front panel adhesive layer 91 is provided between the first battery cell component 11 and the first groove structure 41, a back panel adhesive layer 92 is provided between the second battery cell component 12 and the second groove structure 42, and intermediate adhesive layers 93 are provided between the first battery cell component 11 and the back panel glass 30, between the second battery cell component 12 and the front panel glass 20, and between the front panel glass 20 and the back panel glass 30; Figure 2 In the optional embodiment shown, a front panel adhesive layer 91 is provided between the first battery cell component 11 and the first groove structure 41, and an intermediate adhesive layer 93 is provided between the first battery cell component 11 and the back panel glass 30, and between the front panel glass 20 and the back panel glass 30; Figure 3 In the optional embodiment shown, a backsheet adhesive layer 92 is provided between the second cell component 12 and the second groove structure 42, and an intermediate adhesive layer 93 is provided between the second cell component 12 and the front glass 20, and between the front glass 20 and the backsheet glass 30. This approach reduces the amount of adhesive material used and the weight of the photovoltaic module, thereby lowering the overall cost of the photovoltaic module and facilitating disassembly. It also avoids problems such as air bubbles that may arise from excessive adhesive material usage.

[0086] exist Figure 1-3 In the optional embodiment shown, the intermediate adhesive layer 93 is a complete adhesive layer. In an optional embodiment, the intermediate adhesive layer 93 may also be an incomplete adhesive layer, i.e., the intermediate adhesive layer is a piecewise adhesive layer. Specifically, as... Figure 9-12As shown, the intermediate adhesive layer 93 includes a first intermediate adhesive layer 931 and a second intermediate adhesive layer 932. The first intermediate adhesive layer 931 corresponds to the first groove structure 41 or the second groove structure 42 and is located between the first solar cell component 11 and the back panel glass 30 or between the second solar cell component 12 and the front panel glass 20. The second intermediate adhesive layer 932 has a hollow area, each hollow area corresponding to one first groove structure 41 or the second groove structure 42, located between the front panel glass 20 and the back panel glass 30. The area of ​​the first intermediate adhesive layer 931 can be equal to or smaller than the groove area of ​​the corresponding groove structure, as long as it can cover the solar cell component within the corresponding groove structure. Therefore, when the groove structure is a concave platform with a small bottom and a large opening, using the above-mentioned segmented adhesive layer as the intermediate adhesive layer can further reduce the amount of adhesive material used and the weight of the photovoltaic module, reduce the overall cost of the photovoltaic module, and further avoid problems such as air bubbles that may occur due to the large amount of adhesive material used.

[0087] The adhesive layer is formed by an adhesive sealant, which can be epoxy resin, polyurethane, silicone, or EVA (polyvinyl acetate). Various additives can also be added to the EVA. The desired effect of the adhesive sealant is that it becomes transparent after curing, with good light transmittance. In an optional embodiment of this invention, the material of the front panel adhesive layer 91 includes an adhesive film or silicone. The reflectivity, transmittance, and refractive index of the front panel adhesive layer 91 are between those of the front panel glass 20 and the corresponding solar cell component, in order to maximize the amount of sunlight reaching the solar cell component, thereby improving the utilization rate of sunlight by the solar cell component and ultimately improving the power generation efficiency of the photovoltaic module.

[0088] In this embodiment of the present invention, the dimensions and thickness of the front glass 20 and the back glass 30, as well as the number, length, width, and depth of the first groove structure 41, the second groove structure 42, the first boss structure 61, and the second boss structure 62, can be set according to the size requirements of the photovoltaic module and the internal cell layout design.

[0089] The following describes the preparation method of the photovoltaic module according to a specific embodiment of the present invention. Figure 7-12Taking the photovoltaic module shown as an example, in this embodiment, a first groove structure 41 for placing a first cell component 11 is provided on the first surface 201 of the front glass 20, and a first boss structure 61 that fits into the first groove structure 41 is provided on the first surface 301 of the back glass 30. The first groove structure 41 and the first boss structure 61 form a first accommodating space, and the first cell component 11 is disposed in the first accommodating space. A connecting groove 70 for fixing the interconnecting solder strip 81 is provided between two adjacent first groove structures 41 along the extension direction of the cell string in the front glass 20. A connecting groove 70 for positioning the interconnecting solder strip 81 can also be provided between two adjacent second groove structures 42 along the extension direction of the cell string in the back glass 30. The method for manufacturing this photovoltaic module includes: Step S1: Laying the front panel glass 20 and laying the front panel adhesive layer 91 in the first groove structure 41; Step S2: Laying the first cell component 11 on top of the front panel adhesive layer 91, the first cell component 11 being recessed in the first groove structure 41; Step S3: Laying the interconnecting ribbon 81 on top of the first cell component 11, the interconnecting ribbon 81 passing through the connecting groove 70; Step S4: Using a welding equipment, laser or infrared heating and other welding processes are used to apply energy to the surface of the interconnecting ribbon 81 and the first cell component 11, thereby fixing the interconnecting ribbon 81 and the first cell component 11 and completing the electrical connection; Step S5: Laying the first intermediate adhesive layer 931 on top of the interconnecting ribbon 81 in the first groove structure 41, and laying the second intermediate adhesive layer 932 in the planar area of ​​the front panel glass 20; Step S6: Laying the back panel glass 30, laminating and framing to form a complete module. Figure 7-12 The photovoltaic module shown.

[0090] Regarding the above preparation method, three exemplary embodiments are listed below to further illustrate the photovoltaic module of this utility model.

[0091] Example 1

[0092] In the above preparation method, the front panel adhesive layer 91 and the first solar cell component 11 can be initially bonded immediately after the first solar cell component 11 is laid, or the bonding performance can be achieved during the lamination process. The dimensions of the front panel adhesive layer 91 and the first intermediate adhesive layer 931 are consistent with the dimensions of the first solar cell component 11; the dimensions of the second intermediate adhesive layer 932 are consistent with the external dimensions of the photovoltaic module, and the second intermediate adhesive layer 932 is provided with rectangular cutouts. The number, position, and size of the rectangular cutouts are consistent with the number, position, and size of the first groove structure 41.

[0093] In the above preparation method, ordinary glass that has undergone edge grinding and cleaning processes enters the heating section, where it is treated at high temperature to reach its softening point. It is then transferred to the mold roller via a transfer roller. The mold roller has a structure on its surface that complements the surface structure of the front or back glass. Under the combined action of the mold roller and the symmetrically arranged lower plane roller, the ordinary glass that has reached its softening point forms the glass structure required for the front or back glass of this invention. The ordinary glass with this structure then enters the tempering section, where it undergoes tempering treatment to obtain the front or back glass required for this invention. Specifically, in the front glass 20, the first groove structure 41 has a bottom rectangle dimension of 182.5 × 91.5 mm, an opening rectangle dimension of 183 × 92 mm, and a depth of 0.8 mm. The connecting groove 70 has a width of 1.5 mm and a depth of 0.4 mm. The distance between the opening rectangles of the two first groove structures 41 is 0.5 mm. The bottom of the first groove structure 41 in the front glass 20 is also provided with a distribution channel, which includes a main channel 51 and multiple sub-channels 52. The main channel 51 is 170mm long and has a semi-circular end with a radius of 1.0mm. The main channel 51 can be a single channel or multiple channels. The direction of the main channel 51 is parallel to the direction of the first groove structure 41. The sub-channels 52 communicate with the main channel 51 and are perpendicular to the main channel 51. The sub-channels 52 extend all the way to the first surface 201 of the front glass 20. The top rectangular dimension of the first protrusion structure 61 on the back glass 30 is 182×91mm, the bottom rectangular dimension is 182.5×91.5mm, and the height is 0.5mm. The thickness of both the front glass 20 and the back glass 30 is 2mm.

[0094] In step S1, the front panel adhesive layer 91 has dimensions of 182×91mm and a thickness of 0.2mm. A first battery cell component 11 is laid on top of the front panel adhesive layer 91, recessed within the first groove structure 41. The first battery cell component 11 has dimensions of 182×91mm and a thickness of 110-150µm. Above the first battery cell component 11, an interconnecting ribbon 81 with a cross-section of 0.2×1mm is laid, resting within the connecting groove 70. The interconnecting ribbon 81 is electrically connected to the first battery cell component 11 using laser or infrared heating. A first intermediate adhesive layer 931 is laid on top of the interconnecting ribbon 81 within the first groove structure 41. The first intermediate adhesive layer 931 has dimensions of 182×91mm and a thickness of 0.2mm. When the upper and lower dimensions of the first groove structure 41 are the same, the dimensions of the first intermediate adhesive layer 931 can be the same as the dimensions of the first battery cell component 11. When the first groove structure 41 is an inclined pit with a large opening and a small bottom, the size of the first intermediate adhesive layer 931 can be slightly larger than the size of the first battery cell component 11, such as... Figure 9As shown. Above the first intermediate adhesive layer 931, i.e. the first surface of the front glass 20, a second intermediate adhesive layer 932 is laid, and then the prepared back glass 30 is laid and laminated. During the lamination process, the vacuum function of the laminator, combined with the distribution channel structure design in the first groove structure 41 of the front glass 20, draws out the air remaining in the first intermediate adhesive layer 931 and the first groove structure 41, ensuring the flatness of the first cell component 11 and solving the appearance problem of easy accumulation of air bubbles on the light-receiving surface of the photovoltaic module. Subsequently, the module is framed to form the photovoltaic module of this utility model.

[0095] Example 2

[0096] like Figure 16 As shown, the glass manufacturing process of Embodiment 1 is also adopted. The rectangular dimensions of the first groove structure 41 in the front glass 20 are 182.5×91.5mm and the depth is 0.4mm. The spacing between the planar areas of the two first groove structures 41 is 0.5mm. The planar areas between two adjacent groove structures on the first surface of the front glass 20 and / or the back glass 30 are glazed, and the color of the glaze is used to achieve the effect of inter-panel masking.

[0097] The front panel glass 20 is laid out, and a front panel adhesive layer 91 is laid in the first groove structure 41. The front panel adhesive layer 91 has dimensions of 182×91mm and a thickness of 0.2mm. A first solar cell component 11 is laid on top of the front panel adhesive layer 91. The first solar cell component 11 is recessed in the first groove structure 41 and has dimensions of 182×91mm. An interconnecting ribbon 81 with a cross-section of 0.2×1m is laid on top of the first solar cell component 11. The relative position of the interconnecting ribbon 81 and the first solar cell component 11 is fixed by positioning adhesive. Then, the interconnecting ribbon 81 and the first solar cell component 11 are electrically connected by laser or infrared heating. A whole sheet of intermediate adhesive layer 93 is laid on the plane of the front panel glass 20 with interconnecting ribbon 81. The size of the whole sheet of intermediate adhesive layer 93 is the module size. The back panel glass 30 is then laid out, and after lamination and framing, the photovoltaic module of this utility model is formed.

[0098] Example 3

[0099] like Figure 17As shown, the front glass 20 has a planar structure. The first surface of the front glass 20 (i.e. the side close to the first battery cell component 11) is embossed. A barrier of polymer material is deposited on the embossed surface by printing. A first groove structure 41 for placing the first battery cell component 11 is formed between adjacent barriers. The rectangular dimensions of the first groove structure 41 are 182.5×91.5mm and the depth is 0.4mm. The distance between the barriers between two first groove structures 41 is 0.5mm. Different colors can be used to achieve inter-cell shielding effect. A front panel adhesive layer 91 is laid within the first groove structure 41 formed by the enclosure. The front panel adhesive layer 91 has dimensions of 182×91mm and a thickness of 0.2mm. A first battery cell component 11 is laid above the front panel adhesive layer 91. The first battery cell component 11 is recessed within the first groove structure 41 and has dimensions of 182×91mm. Above the first battery cell component 11, an interconnecting ribbon 81 with a cross-section of 0.2×1mm is laid. The relative position of the interconnecting ribbon 81 and the first battery cell component 11 is fixed using positioning adhesive. Then, the interconnecting ribbon 81 and the first battery cell component 11 are electrically connected by laser or infrared heating. A whole sheet of intermediate adhesive layer 93 is laid on the plane of the front panel glass 20 with the interconnecting ribbon 81. The size of the whole sheet of intermediate adhesive layer 93 is the same as that of the photovoltaic module. Then, the prepared back panel glass is laid, and after lamination and framing, the photovoltaic module of this utility model is formed.

[0100] This invention optimizes the glass plate structure, improving its structural rigidity and enabling better positioning of the solar cell components and interconnecting ribbons. Combined with plate-welding technology for photovoltaic module fabrication, it enhances the module's resistance to deformation. By increasing the mechanical strength of the photovoltaic module, this invention reduces the stress on the solar cell components within the laminate, significantly lowering the risk of microcracks and fragmentation during strain, thus improving the module's performance and lifespan. Furthermore, this invention not only increases the module's inherent rigidity but also effectively reduces the amount of adhesive material used, lowering the overall cost of the photovoltaic module and facilitating easy disassembly.

[0101] In summary, this utility model provides the following technical solution:

[0102] Technical Solution 1. A photovoltaic module, comprising at least a front panel glass 20, a cell array and a back panel glass 30 stacked sequentially, wherein the cell array comprises a first cell component 11 and / or a second cell component 12;

[0103] The first surface of the front glass 20 is provided with a first groove structure 41, and the first groove structure 41 and the back glass 30 form a first receiving space, in which the first battery cell component 11 is placed; and / or, the first surface of the back glass 30 is provided with a second groove structure 42, and the second groove structure 42 and the front glass 20 form a second receiving space, in which the second battery cell component 12 is placed;

[0104] At least a portion of the inner surface of the first groove structure 41 and / or the second groove structure 42 is provided with a recessed distribution channel 50.

[0105] Technical Solution 2. According to the photovoltaic module of Technical Solution 1, the distribution channel 50 includes a main channel 51 and a plurality of sub-channels 52 that are connected to the main channel 51; at least a portion of the main channel 51 is disposed at the bottom of the groove structure in which it is located, and the plurality of sub-channels 52 are spaced apart on both sides of the main channel 51.

[0106] Technical Solution 3. According to the photovoltaic module of Technical Solution 1, the main channel 51 is parallel to the long side of the cell component; and / or, the end of the main channel 51 is arc-shaped or extends to the slot of the groove structure in which it is located; and / or, the end of the sub-channel 52 is arc-shaped or extends to the slot of the groove structure in which it is located.

[0107] Technical Solution 4. A photovoltaic module based on any one of Technical Solutions 1-3,

[0108] The first groove structure 41 and / or the second groove structure 42 are concave platforms with a small bottom and a large opening, and the slope angle of the concave platform is 0-30°.

[0109] And / or, the difference between the length of the groove bottom of the recessed platform and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the width of the groove bottom of the recessed platform and the width of the corresponding battery cell component is 0.5-1mm.

[0110] And / or, the difference between the groove length of the recessed platform and the length of the corresponding battery cell component is 1-3mm, and the difference between the groove width of the recessed platform and the width of the corresponding battery cell component is 1-3mm.

[0111] Technical Solution 5. According to the photovoltaic module of Technical Solution 1, the first surface of the back glass 30 is provided with a first boss structure 61 that fits into the first groove structure 41, and the first groove structure 41 and the first boss structure 61 form a first accommodating space; and / or, the first surface of the front glass 20 is provided with a second boss structure 62 that fits into the second groove structure 42, and the second groove structure 42 and the second boss structure 62 form a second accommodating space.

[0112] Technical Solution 6. According to the photovoltaic module of Technical Solution 5, the cavity gap between the groove structure and the corresponding boss structure is 0.5-1.0mm.

[0113] Technical Solution 7. According to the photovoltaic module of Technical Solution 5, the first boss structure 61 and / or the second boss structure 62 are boss platforms with a small top and a large bottom;

[0114] And / or, the difference between the top length of the boss body and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the top width of the boss body and the width of the corresponding battery cell component is 0.5-1mm;

[0115] And / or, the difference between the bottom length of the boss body and the length of the corresponding battery cell component is 1-3mm, and the difference between the bottom width of the boss body and the width of the corresponding battery cell component is 1-3mm;

[0116] And / or, the inclined plane angle of the boss body is 0-30°.

[0117] Technical Solution 8. According to the photovoltaic module of Technical Solution 1, a connecting groove 70 for fixing an interconnecting solder strip 81 is provided between two adjacent first groove structures 41 in the front glass 20 along the extension direction of the cell string, and / or between two adjacent second groove structures 42 in the back glass 30 along the extension direction of the cell string; the interconnecting solder strip 81 is electrically connected to the cell component in the corresponding groove structure.

[0118] Technical Solution 9. According to the photovoltaic module of Technical Solution 8, the depth of the connecting groove 70 is less than or equal to the depth of its corresponding groove structure; and / or, the width of the connecting groove 70 is 1-1.5 times the width of the interconnecting solder strip 81.

[0119] Technical Solution 10. According to the photovoltaic module of Technical Solution 1, the first surface of the front glass 20 is provided with a first groove structure 41, and the first surface of the back glass 30 is provided with a second groove structure 42.

[0120] Along the battery string arrangement direction, the first groove structure 41 and the second groove structure 42 are alternately distributed, and the opposite sides of adjacent first groove structures 41 and second groove structures 42 are in the same vertical plane; wherein, the vertical plane is a plane perpendicular to the battery string arrangement direction.

[0121] Technical Solution 11. According to the photovoltaic module of Technical Solution 1, multiple first cell components 11 on the front glass 20 along the extension direction of the cell string are electrically connected by interconnecting solder strips 81 to form a first cell string, and multiple second cell components 12 on the back glass 30 along the extension direction of the cell string are electrically connected by interconnecting solder strips 81 to form a second cell string, wherein the first cell string and / or the second cell string are negative-pitch cell strings or positive-pitch cell strings.

[0122] Technical Solution 12. According to the photovoltaic module of Technical Solution 1, the front glass 20 and / or the back glass 30 are provided with a busbar groove 82 for placing the busbar solder strip.

[0123] Technical Solution 13. According to the photovoltaic module of Technical Solution 1, at least one end of the cell string on the front glass 20 and / or the back glass 30 is connected to a busbar; the busbars corresponding to the ends of two adjacent cell strings on the front glass 20 are electrically connected, and / or, the busbars corresponding to the ends of two adjacent cell strings on the back glass 30 are electrically connected.

[0124] Technical Solution 14. According to any one of Technical Solutions 1-13, the end of the front glass 20 and the end of the back glass 30 are connected by a slot and a protrusion.

[0125] Technical Solution 15. A photovoltaic module based on any one of Technical Solutions 1-13,

[0126] An anti-reflective coating is provided on the second surface of the front glass 20;

[0127] And / or, a printed layer is provided on the second surface of the front glass 20;

[0128] And / or, the first surface of the front glass 20 and / or the back glass 30 is an embossed surface;

[0129] And / or, the planar area between two adjacent groove structures on the first surface of the front glass 20 and / or the back glass 30 is glazed, and the projection of the glazed area on the horizontal plane does not overlap with the projection of the battery cell component on the horizontal plane.

[0130] Technical Solution 16. A photovoltaic module based on any one of Technical Solutions 1-13,

[0131] The surface of the first battery cell component 11 facing the back glass 30 is located within the first groove structure 41 or is flush with the first surface of the front glass 20.

[0132] And / or, the surface of the second battery cell component 12 facing the front glass 20 is located within the second recess structure 42 or flush with the first surface of the back glass 30.

[0133] Technical Solution 17. A photovoltaic module based on any one of Technical Solutions 1-13,

[0134] A front panel adhesive layer 91 is provided between the first battery cell component 11 and the first groove structure 41, and / or a back panel adhesive layer 92 is provided between the second battery cell component 12 and the second groove structure 42.

[0135] An intermediate adhesive layer 93 is provided between the front glass 20 and the back glass 30.

[0136] Technical Solution 18. The photovoltaic module according to Technical Solution 17, wherein the intermediate adhesive layer 93 includes a first intermediate adhesive layer 931 and a second intermediate adhesive layer 932;

[0137] The first intermediate adhesive layer 931 corresponds to the first groove structure 41 or the second groove structure 42; the second intermediate adhesive layer 932 has a hollow area, and each hollow area corresponds to a first groove structure 41 or a second groove structure 42.

[0138] Technical Solution 19. According to the photovoltaic module of Technical Solution 17, the material of the front panel adhesive layer (91) includes adhesive film or silicone, and the reflectivity, transmittance and refractive index of the front panel adhesive layer 91 are located between the front panel glass 20 and the corresponding cell component.

[0139] In this embodiment of the invention, by providing recessed distribution channels in at least a portion of the inner surface of the groove structure on the glass plate, excess adhesive material will enter the distribution channels during the flow of adhesive material. This ensures that the solar cell components are flat within the groove structure. At the same time, since air bubbles can escape from the distribution channels along with the excess adhesive material, this invention can mitigate or avoid the problem of air bubbles appearing on the light-receiving surface of the photovoltaic module due to the solar cell components being placed within the groove structure on the glass plate, thereby improving the performance and lifespan of the photovoltaic module.

[0140] The above steps are provided only to help understand the method, structure, and core idea of ​​this utility model. For those skilled in the art, various improvements and modifications can be made to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A photovoltaic module, characterized by, It includes at least a front panel glass (20), a battery array, and a back panel glass (30) stacked in sequence, wherein the battery array includes a first battery cell component (11) and / or a second battery cell component (12); The first surface (201) of the front glass (20) is provided with a first groove structure (41), the first groove structure (41) and the back glass (30) form a first receiving space, and the first battery cell component (11) is placed in the first receiving space; and / or, the first surface (301) of the back glass (30) is provided with a second groove structure (42), the second groove structure (42) and the front glass (20) form a second receiving space, and the second battery cell component (12) is placed in the second receiving space; At least a portion of the inner surface of the first groove structure (41) and / or the second groove structure (42) is provided with a recessed distribution channel (50).

2. The photovoltaic module of claim 1, wherein, The distribution channel (50) includes a main channel (51) and a plurality of sub-channels (52) communicating with the main channel (51); at least a portion of the main channel (51) is disposed at the bottom of the groove structure in which it is located, and the plurality of sub-channels (52) are spaced apart on both sides of the main channel (51).

3. The photovoltaic module of claim 1, wherein, The main channel (51) is parallel to the long side of the battery cell component; and / or, the end of the main channel (51) is arc-shaped or extends to the groove opening of the groove structure in which it is located; and / or, the end of the sub-channel (52) is arc-shaped or extends to the groove opening of the groove structure in which it is located.

4. The photovoltaic module according to any one of claims 1-3, characterized in that, The first groove structure (41) and / or the second groove structure (42) are concave platforms with a small bottom and a large opening, and the slope angle of the concave platform is 0-30°; And / or, the difference between the length of the groove bottom of the recessed platform and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the width of the groove bottom of the recessed platform and the width of the corresponding battery cell component is 0.5-1mm; And / or, the difference between the groove length of the recessed platform and the length of the corresponding battery cell component is 1-3mm, and the difference between the groove width of the recessed platform and the width of the corresponding battery cell component is 1-3mm.

5. The photovoltaic module according to claim 1, characterized in that, The first surface (301) of the back glass (30) is provided with a first boss structure (61) that fits into the first groove structure (41) of the front glass (20), and the first groove structure (41) and the first boss structure (61) form the first accommodating space. And / or, the first surface (201) of the front glass (20) is provided with a second boss structure (62) that engages with the second groove structure (42) of the back glass (30), and the second groove structure (42) and the second boss structure (62) form the second accommodating space.

6. The photovoltaic module of claim 5, wherein, The cavity gap between the groove structure and the corresponding boss structure is 0.5-1.0mm.

7. The photovoltaic module according to claim 5, characterized in that, The first boss structure (61) and / or the second boss structure (62) are boss-shaped structures with a small top and a large bottom; And / or, the difference between the top length of the boss body and the length of the corresponding battery cell component is 0.5-1mm, and the difference between the top width of the boss body and the width of the corresponding battery cell component is 0.5-1mm; And / or, the difference between the bottom length of the boss body and the length of the corresponding battery cell component is 1-3mm, and the difference between the bottom width of the boss body and the width of the corresponding battery cell component is 1-3mm; And / or, the inclined plane angle of the boss body is 0-30°.

8. The photovoltaic module according to claim 1, characterized in that, A connecting groove (70) for fixing an interconnecting solder strip (81) is provided between two adjacent first groove structures (41) in the front glass (20) along the extension direction of the battery string, and / or between two adjacent second groove structures (42) in the back glass (30) along the extension direction of the battery string; the interconnecting solder strip (81) is electrically connected to the battery cell component in the corresponding groove structure.

9. The photovoltaic module according to claim 8, characterized in that, The depth of the connecting groove (70) is less than or equal to the depth of its corresponding groove structure; and / or, the width of the connecting groove (70) is 1-1.5 times the width of the interconnecting solder strip (81).

10. The photovoltaic module according to claim 1, characterized in that, The first surface (201) of the front glass (20) is provided with a first groove structure (41), and the first surface (301) of the back glass (30) is provided with a second groove structure (42); Along the battery string arrangement direction, the first groove structure (41) and the second groove structure (42) are alternately distributed, and the opposite sides of adjacent first groove structures (41) and second groove structures (42) are in the same vertical plane; wherein, the vertical plane is a plane perpendicular to the battery string arrangement direction.

11. The photovoltaic module according to claim 1, characterized in that, On the front glass (20), multiple first battery cell components (11) along the battery string extension direction are electrically connected by interconnecting solder strips (81) to form a first battery string. On the back glass (30), multiple second battery cell components (12) along the battery string extension direction are electrically connected by interconnecting solder strips (81) to form a second battery string. The first battery string and / or the second battery string are negative-pitch battery strings or positive-pitch battery strings.

12. The photovoltaic module according to claim 1, characterized in that, The front glass panel (20) and / or the back glass panel (30) are provided with a busbar groove (82) for placing the busbar solder strip.

13. The photovoltaic module according to claim 1, characterized in that, At least one end of the battery string on the front glass (20) and / or the back glass (30) is connected to a busbar; the busbars corresponding to the ends of two adjacent battery strings on the front glass (20) are electrically connected, and / or the busbars corresponding to the ends of two adjacent battery strings on the back glass (30) are electrically connected.

14. The photovoltaic module according to any one of claims 1-13, characterized in that, The ends of the front glass (20) and the back glass (30) are connected by a slot and a protrusion.

15. The photovoltaic module according to any one of claims 1-13, characterized in that, The second surface of the front glass (20) is provided with an anti-reflective coating; And / or, the second surface of the front panel glass (20) is provided with a printed layer; And / or, the first surface of the front glass (20) and / or the back glass (30) is an embossed surface; And / or, the planar area between two adjacent groove structures on the first surface of the front glass (20) and / or the back glass (30) is glazed, and the projection of the glazed area in the horizontal plane does not overlap with the projection of the battery cell component in the horizontal plane.

16. The photovoltaic module according to any one of claims 1-13, characterized in that, The surface of the first battery cell component (11) facing the back glass (30) is located within the first groove structure (41) or flush with the first surface (201) of the front glass (20); And / or, the surface of the second battery cell component (12) facing the front glass (20) is located within the second recess structure (42) or flush with the first surface (301) of the back glass (30).

17. The photovoltaic module according to any one of claims 1-13, characterized in that, A front panel adhesive layer (91) is provided between the first battery cell component (11) and the first groove structure (41), and / or a back panel adhesive layer (92) is provided between the second battery cell component (12) and the second groove structure (42); An intermediate adhesive layer (93) is provided between the front glass panel (20) and the back glass panel (30).

18. The photovoltaic module according to claim 17, characterized in that, The intermediate adhesive layer (93) includes a first intermediate adhesive layer (931) and a second intermediate adhesive layer (932); The first intermediate adhesive layer (931) corresponds to the first groove structure (41) or the second groove structure (42); the second intermediate adhesive layer (932) has a hollow area, and each hollow area corresponds to one of the first groove structure (41) or the second groove structure (42).

19. The photovoltaic module according to claim 17, characterized in that, The material of the front panel adhesive layer (91) includes an adhesive film or silicone, and the reflectivity, transmittance and refractive index of the front panel adhesive layer (91) are located between the front panel glass (20) and the corresponding battery cell component.

Images