Photovoltaic module and photovoltaic component

Abstract

The embodiment of the present disclosure relates to the photovoltaic field, and provides a photovoltaic module and a photovoltaic component, wherein the photovoltaic module comprises: a plurality of cell strings arranged along a first direction, the cell string comprising a plurality of cell pieces arranged along a second direction; a first bus bar extending along the first direction and electrically connected with the plurality of cell strings arranged along the first direction; a first shielding layer extending along the first direction and located on the first bus bar and opposite to the first bus bar; a second shielding layer extending along the second direction and located on one side of the cell string in the first direction, and the second shielding layer is connected with the first shielding layer; wherein the surface of the first shielding layer and the surface of the second shielding layer are the same or similar to the surface color of the cell piece. The technical scheme provided by the embodiment of the present disclosure can improve the aesthetic degree of the photovoltaic module.

Description

Technical Field

[0001] This disclosure relates to the photovoltaic field, and in particular to a photovoltaic module and photovoltaic component. Background Technology

[0002] A solar cell is a thin film of photovoltaic semiconductors that directly generates electricity using sunlight. Also known as a "solar chip" or "photovoltaic cell," it can instantly output voltage and generate current when a circuit is established, provided it receives sufficient illumination. In physics, this is called solar photovoltaic (PV), or simply photovoltaic.

[0003] Photovoltaic modules generally refer to solar cell modules. Because the output voltage of a single solar cell is relatively low, a certain number of individual cells must be sealed together in series and parallel to form a photovoltaic module. Summary of the Invention

[0004] This disclosure provides a photovoltaic module and photovoltaic component, which can at least improve the aesthetics of the photovoltaic module.

[0005] According to some embodiments of this disclosure, one aspect of this disclosure provides a photovoltaic module, including: a plurality of battery strings arranged along a first direction, the battery strings including a plurality of battery cells arranged along a second direction; a first busbar extending along the first direction and electrically connected to the plurality of battery strings arranged along the first direction; a first shading layer extending along the first direction and located on the first busbar, directly opposite the first busbar; and a second shading layer extending along the second direction, located on one side of the battery strings in the first direction, and connected to the first shading layer; wherein the surfaces of the first shading layer and the second shading layer are the same or similar in color to the surfaces of the battery cells.

[0006] In some embodiments, the device further includes: a second busbar extending along the second direction, the second busbar being electrically connected to a plurality of battery cells arranged in the second direction, the second busbar being electrically connected to the first busbar, and at least a portion of the second busbar being directly opposite the second shielding layer.

[0007] In some embodiments, along the second direction, the width of the second shielding layer is greater than that of the second busbar.

[0008] In some embodiments, the device further includes an encapsulating film for covering the surfaces of the battery string, the first shielding layer, and the second shielding layer.

[0009] In some embodiments, the encapsulating film includes: a first film layer, the first film layer being directly opposite the gap between the adjacent battery cells, and the color of the first film layer being the same as or similar to the surface color of the battery cells; and a second film layer, the second film layer covering the surface of the first film layer away from the battery cells.

[0010] In some embodiments, the system further includes a third shielding layer, which includes a light-transmitting area and a light-shielding area. The light-transmitting area is directly opposite the battery cell, and the light-shielding area is directly opposite the gap between adjacent battery cells. The surface of the light-shielding area is the same as or similar in color to the surface of the battery cell.

[0011] In some embodiments, along the second direction, the width of the light-shielding area is greater than the gap between adjacent solar cells, and the difference between the width of the light-shielding area and the gap between adjacent solar cells is 5 to 8 mm.

[0012] In some embodiments, in the second direction, the battery string includes opposing front and back sides, and the third shielding layer is located on the back side of the battery string.

[0013] In some embodiments, the color of the first busbar is the same as or similar to the color of the surface of the battery cell.

[0014] According to some embodiments of this disclosure, another aspect of this disclosure provides a photovoltaic module, including: a mounting bracket, the mounting bracket being fixedly connected to a roof, and the mounting bracket having a limiting space; a plurality of photovoltaic modules as described in some or all of the above embodiments, with adjacent photovoltaic modules overlapping vertically, and the photovoltaic modules being snapped into the limiting space.

[0015] The technical solutions provided in this disclosure have at least the following advantages:

[0016] The battery string serves as the current-generating carrier of the photovoltaic module. The first busbar is used to collect the charge carriers on the battery string and serve as the output port. The first shading layer is used to shield the first busbar, and the first shading layer is the same or similar in color to the surface of the battery cell, thereby avoiding excessive color difference between the first busbar and the battery string. The second shading layer, which is the same or similar in color to the surface of the battery cell, is also used to improve the color uniformity of the photovoltaic module. Moreover, the second shading layer only shields one side of the surface of the battery string, and the other side of the battery string can be used to overlap with adjacent photovoltaic modules, thereby improving the aesthetics of the photovoltaic module while reducing costs. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A top view of a photovoltaic module provided in an embodiment of this disclosure;

[0019] Figure 2 A top view of a photovoltaic module provided in an embodiment of this disclosure;

[0020] Figure 3 A partial top view of a photovoltaic module provided in an embodiment of this disclosure;

[0021] Figure 4 This is a three-dimensional structural schematic diagram of a photovoltaic module provided in an embodiment of the present disclosure;

[0022] Figure 5 Another partial structural cross-sectional view of a photovoltaic module provided in an embodiment of this disclosure;

[0023] Figure 6 This is a schematic diagram of the structure of an encapsulating film provided in an embodiment of the present disclosure;

[0024] Figure 7 This is a schematic diagram of a photovoltaic module overlapping structure provided in one embodiment of the present disclosure;

[0025] Figure 8 This is a schematic diagram of the structure of a photovoltaic component provided in one embodiment of the present disclosure;

[0026] Figure 9 This is a partial structural enlarged schematic diagram of a photovoltaic component provided in an embodiment of the present disclosure. Detailed Implementation

[0027] As can be seen from the background technology, currently, the color of the first busbar is usually silver, while the color of the solar cells is blue or black. When viewing the photovoltaic module from the front, there is a significant color difference between the first busbar and the solar cells.

[0028] This disclosure provides a photovoltaic module, wherein a battery string serves as the current generation carrier of the photovoltaic module, a first busbar is used to collect the charge carriers on the battery string and serve as an output port, a first shading layer is used to shield the first busbar, and the first shading layer is the same or similar in color to the surface of the battery cell, thereby avoiding excessive color difference between the first busbar and the battery string, and a second shading layer with the same or similar color to the surface of the battery cell is also used to improve the color uniformity of the photovoltaic module, and for the second shading layer, only one side of the surface of the battery string is shielded, and the other side of the battery string can be used to overlap with adjacent photovoltaic modules, thereby improving the aesthetics of the photovoltaic module while reducing costs.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0033] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element 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 the embodiments of this application.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0035] In the accompanying drawings corresponding to the embodiments of this application, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0036] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "on / located" on another component, it can be "directly" on the other component (i.e., located on the surface of the other component with no other components between them), or it can have another component present in between. Moreover, when a component such as a layer, film, region, or plate is "directly located" on another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it indicates that no other components are located in between.

[0037] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0038] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the embodiments. However, the technical solutions claimed in the embodiments of this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0039] Figure 1 A top view of a photovoltaic module provided in an embodiment of this disclosure; Figure 2 Another top view of the photovoltaic module provided in the embodiments of this disclosure; Figure 3 A top view of the third shading layer provided in an embodiment of this disclosure; Figure 4 A perspective view of a battery string provided in an embodiment of this disclosure; Figure 5 for Figure 4 A cross-sectional view along the M2 direction; Figure 6 This is a schematic diagram of the structure of an encapsulating film provided in one embodiment of the present disclosure; it should be noted that, for ease of understanding, Figure 1 The first and second shielding layers are not shown in the image. Figure 3 Only the third shielding layer is shown in the image. Figure 4 The encapsulation film and cover plate are not shown in the image.

[0040] refer to Figures 1 to 6 The photovoltaic module may include a plurality of cell strings 100 arranged along a first direction X, and the cell strings 100 include a plurality of cell cells 110 arranged along a second direction Y.

[0041] The photovoltaic module may also include a first busbar 101, which extends along a first direction X and is electrically connected to a plurality of battery strings 100 arranged along the first direction X.

[0042] The photovoltaic module may also include a first shading layer 102, which extends along a first direction X and is located on the first busbar 101 and is directly opposite to the first busbar 101.

[0043] The photovoltaic module may also include a second shading layer 103, which extends along the second direction Y and is located on one side of the cell string 100 in the first direction X, and the second shading layer 103 is connected to the first shading layer 102; wherein the first shading layer 102 and the second shading layer 103 are the same or similar in color to the surface of the cell 110.

[0044] In this embodiment, the battery string 100 serves as the current generation carrier of the photovoltaic module. The first busbar 101 is used to collect the charge carriers on the battery string 100 and serve as the output port. The first shielding layer 102 is used to shield the first busbar 101, and the first shielding layer 102 is the same or similar in color to the surface of the battery cell 110, thereby avoiding excessive color difference between the first busbar 101 and the battery string 100. The second shielding layer 103, which is the same or similar in color to the surface of the battery cell 110, is also used to improve the color uniformity of the photovoltaic module. Moreover, the second shielding layer 103 only shields one side of the surface of the battery string 100, and the other side of the battery string 100 can be used to connect with adjacent photovoltaic modules, thereby improving the aesthetics of the photovoltaic module while reducing costs.

[0045] In some embodiments, the battery string 100 may include a plurality of battery cells 110 and solder ribbons 120 connecting adjacent battery cells in series. The battery cells 110 include, but are not limited to, PERC (Passivated Emitter Rear Cell), IBC (Interdigitated Back Contact), TOPCon (Tunnel Oxide Passivated Contact), HIT / HJT (Heterojunction Technology), thin-film solar cells, and tandem solar cells, or any combination thereof. Thin-film solar cells include, but are not limited to, perovskite thin-film solar cells, copper indium selenide (CIGS) thin-film solar cells, gallium arsenide (GaAs) thin-film solar cells, and cadmium sulfide (CdS) thin-film solar cells. Tandem solar cells include, but are not limited to, perovskite cells stacked with crystalline silicon cells, perovskite cells stacked with perovskite cells, and perovskite cells stacked with thin-film cells. The solder ribbons 120 are typically tin-plated or tin-coated copper ribbons used to electrically connect adjacent battery cells 110.

[0046] The first busbar 101 is typically made of copper or other conductive materials, possessing good conductivity and corrosion resistance. This disclosure does not limit the material of the first busbar 101; other materials suitable for use as the first busbar can also be applied in this disclosure.

[0047] The connection between the multiple battery strings 100 and the first busbar 101 can be in series or in parallel, and can be selected according to the actual situation.

[0048] In some embodiments, the color of the first busbar 101 may be the same as or similar to the color of the surface of the solar cell 110. By changing the color of the first busbar 101, the surface color of the photovoltaic module can still be consistent even when the first shading layer 102 does not completely block the first busbar 101, thereby further improving the aesthetics of the photovoltaic module.

[0049] It should be noted that in this embodiment, "same color" means that the color difference between the two colors is less than or equal to 0.5 NBS; "similar color" means that the color difference between the two colors is greater than 0.5 NBS and less than or equal to 1 NBS. Taking the surface color of the battery cell 110 as black as an example, the surface color of the first busbar 101 can also be black, and the color difference between the black surface of the first busbar 101 and the black surface of the battery cell is less than or equal to 1 NBS.

[0050] The first shading layer 102 is used to shade the surface of the first busbar 101, so that the entire photovoltaic module appears to have a uniform color, such as appearing black, or the first shading layer 102 reduces the area of ​​different colors on the surface of the photovoltaic module, thereby improving the aesthetics of the photovoltaic module.

[0051] The first shielding layer 102 can be formed by applying adhesive tape or by coating.

[0052] In some embodiments, the first shielding layer 102 can directly cover the surface of the first busbar 101. By directly covering the surface of the first busbar 101, the installation of the first shielding layer 102 can be facilitated, the installation accuracy of the first shielding layer 102 can be improved, thereby avoiding the situation where the first shielding layer 102 cannot completely shield the first busbar 101, thereby improving the reliability of the first shielding layer 102 shielding the entire surface of the first busbar 101.

[0053] In some embodiments, the photovoltaic module may further include a cover plate 107, and the first shading layer 102 may be adhered to the surface of the cover plate 107 away from the solar cell 110, or coated on the surface of the cover plate 107 away from the solar cell 110.

[0054] In some embodiments, the second shading layer 103 is located on one side of the battery string 100 in the first direction X. Similar to the first shading layer 102, the second shading layer 103 can also shade the edge of the photovoltaic module and together with the first shading layer 102, they form a U-shape. In other words, the photovoltaic module includes two sides arranged along the first direction X and two sides arranged along the second direction Y. The first shading layer 102 can shade the two sides of the photovoltaic module arranged along the second direction Y, and the second shading layer 103 can shade one side of the photovoltaic module arranged along the first direction X. The remaining side of the photovoltaic module can be used to overlap with an adjacent photovoltaic module. In this way, all four sides of the photovoltaic module are shaded, and the amount of second shading layer 103 used on one side is reduced, thereby reducing the manufacturing cost of the photovoltaic module while improving its aesthetics.

[0055] In other embodiments, the second shading layer 103 may also be located on two sides of the photovoltaic module arranged along the second direction Y, and the width of the second shading layer 103 on the two sides may be different. The second shading layer 103 on one side has a first width, and the second shading layer 103 on the other side has a second width. The first width is greater than the second width. One side of the second shading layer 103 can be used to overlap with the adjacent photovoltaic module, and appropriate space can be reserved according to the size of the overlap.

[0056] In some embodiments, the color of the second shielding layer 103 may be the same as or similar to the color of the surface of the battery cell 110. For example, if the surface of the battery cell 110 is black, the surface of the second shielding layer 103 may also be black, and the color difference between the black of the second shielding layer 103 and the black of the battery cell 110 is less than or equal to 1 NBS.

[0057] In some embodiments, the material of the second shielding layer 103 may be the same as the material of the first shielding layer 102, and the material of the second shielding layer 103 and / or the material of the first shielding layer 102 may be PET film or tape.

[0058] In some embodiments, the photovoltaic module may further include a second busbar 104 extending along a second direction Y. The second busbar 104 is electrically connected to a plurality of solar cells 110 arranged along the second direction Y in the cell string 100. The second busbar 104 is also electrically connected to a first busbar 101, and at least a portion of the second busbar 104 is directly opposite the second shading layer 103. The second busbar 104 allows the plurality of cell strings 100 to be connected in parallel, thereby enabling the output of a larger current and further meeting electricity demand.

[0059] In some embodiments, the second busbar 104 and the first busbar 101 also form a U-shape, with the first busbar 101 serving as the two opposite sides of the U-shape and the second busbar 104 serving as the bottom edge of the U-shape. The overall shape is consistent with that of the first shading layer 102 and the second shading layer 103. Moreover, in this embodiment of the present disclosure, the first shading layer 102 and the second shading layer 103 cover the first busbar 101 and the second busbar 104, thereby improving the aesthetics of the photovoltaic module.

[0060] In some embodiments, in the second direction Y, the width of the second shading layer 103 is greater than that of the second busbar 104. On the one hand, this allows the second shading layer 103 to completely shield the second busbar 104, thereby improving the aesthetics of the photovoltaic module. On the other hand, it can also shield the gap between the edge of the photovoltaic module and the cell string 100, thereby further improving the aesthetics of the photovoltaic module.

[0061] refer to Figure 4 and Figure 5 In some embodiments, the photovoltaic module may further include an encapsulating film 106, which is used to cover the surfaces of the cell string 100, the first shielding layer 102, and the second shielding layer 103. That is, the first shielding layer 102 covers the surface of the first busbar 101, which can improve the installation accuracy of the first shielding layer 102, thereby avoiding the situation where the first shielding layer 102 cannot completely shield the first busbar 101, and reducing the risk of the first shielding layer 102 obstructing the first busbar 101.

[0062] In some embodiments, a second busbar 104 is also included, with the encapsulating film 106 covering the surface of the second shielding layer 103. That is, the second shielding layer 103 directly covers the surface of the second busbar 104, which also facilitates the installation of the second shielding layer 103 and improves the installation accuracy of the second shielding layer 103. This avoids the situation where the second shielding layer 103 cannot completely shield the second busbar 104, and increases the possibility of using the second shielding layer 103 to completely shield the second busbar 104.

[0063] The encapsulating film 106 may include a first encapsulating layer (not shown) and a second encapsulating layer (not shown). The first encapsulating layer covers one of the front or back sides of the battery cell, and the second encapsulating layer covers the other of the front or back sides of the battery cell. Specifically, at least one of the first encapsulating layer or the second encapsulating layer may be an organic encapsulating film such as polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyolefin thermoplastic elastomer (POE), or polyethylene glycol terephthalate (PET).

[0064] It is understandable that the first encapsulation layer and the second encapsulation layer have a dividing line before the lamination process. After the lamination process, the formed photovoltaic module will no longer have the concept of the first encapsulation layer and the second encapsulation layer. That is, the first encapsulation layer and the second encapsulation layer have formed an integral encapsulation film 106.

[0065] In some embodiments, the first shielding layer 102 and the second shielding layer 103 can also be part of the encapsulating film 106. Taking the first shielding layer 102 as an example, the encapsulating film 106 has a two-layer structure, wherein the layer closer to the solar cell 110 serves as the first shielding layer 102, and the layer farther away from the solar cell 110 serves as the encapsulation layer of the photovoltaic module. By making the first shielding layer 102 and the second shielding layer 103 also part of the encapsulating film 106, the process steps for forming the photovoltaic module can be reduced, thereby reducing the cost of the photovoltaic module.

[0066] Reference Figure 2 and Figure 3 In some embodiments, the photovoltaic module may further include a third shading layer 105. The third shading layer 105 may include a light-transmitting area 115 and a light-shading area 125. The light-transmitting area 115 faces the solar cell 110, and the light-shading area 125 faces the gap between adjacent solar cells 110. The surface color of the light-shading area 125 is the same as or similar to that of the solar cell 110. By having the light-transmitting area 115 face the solar cell 110, the third shading layer 105 can be prevented from affecting the light absorption of the solar cell 110. By having the light-shading area 125 face the gap between adjacent solar cells 110, the aesthetics of the photovoltaic module can be further improved.

[0067] In some embodiments, the material of the third shielding layer 105 may be a PVB film, an EVA film, or a PET film, etc. The color of the third shielding layer 105 may be the same as or similar to the color of the surface of the battery cell 110. For example, if the surface of the battery cell 110 is black, the surface of the third shielding layer 105 may also be black, and the color difference between the black of the surface of the third shielding layer 105 and the black of the surface of the battery cell 110 is less than or equal to 1 NBS.

[0068] In some embodiments, the battery string 100 includes a front and a back side, with a shading area 125 located on the back side of the battery string 100. By setting a third shading layer 105 on the back side of the battery string 100, even if the shading area 125 of the third shading layer 105 is not perfectly aligned with the gap between the battery cells, it will not significantly affect the light absorption of the battery string 100. This improves the aesthetics of the photovoltaic module while reducing the risk of using the third shading layer 105 to block the gaps in the battery string 100.

[0069] It should be noted that in some embodiments, the battery string is a single-sided photovoltaic battery string, where the front side of the battery string can serve as the light-receiving surface to receive incident light, and the back side serves as the backlighting surface. In some embodiments, the battery string is a double-sided battery string, where both the front and back sides of the battery string can serve as light-receiving surfaces and can be used to receive incident light. It is understood that the backlighting surface referred to in the embodiments of this disclosure can also receive incident light, but the degree of reception of incident light is weaker than that of the light-receiving surface, and therefore it is defined as a backlighting surface.

[0070] In some embodiments, the material of the light-transmitting area 115 can be the same as the material of the light-shielding area 125. The difference is that the material of the light-shielding area 125 can be doped with pigment. For example, if the color of the battery cell 110 is black, black pigment can be doped into the material of the light-shielding area 125 to form a black light-shielding area 125.

[0071] In some embodiments, for the light-transmitting area 115 and the light-shielding area 125, the light-transmitting area 115 can be a transparent third shielding layer 105, and the light-shielding area 125 can be a third shielding layer 105 with a certain color. It can be understood that having a certain color here means having a color that is the same as or similar to the surface color of the battery cell 110. For example, if the surface color of the battery cell 110 is black, then the surface color of the light-shielding area 125 can be black.

[0072] In some embodiments, the color of the surface of the shading area 125 may be the same as or similar to the color of the surface of the solar cell 110, so that the surface color of the entire photovoltaic module appears consistent.

[0073] In other embodiments, the light-transmitting area 115 may also be a hole in the third shielding layer 105. In other words, during the formation of the third shielding layer 105, after the entire surface of the third shielding layer 105 is formed, a portion of the third shielding layer 105 is removed to make the third shielding layer 105 mesh-like, with the mesh openings facing the battery cell 110. This removed portion serves as the light-transmitting area 115 of the third shielding layer 105.

[0074] In some embodiments, in the second direction Y, the width of the shading area 125 is greater than the gap between adjacent solar cells 110, and the difference between the width of the shading area 125 and the gap between adjacent solar cells 110 is 5-8 mm. In other words, the shading area 125 not only faces the gap between adjacent solar cells 110, but also blocks part of the surface of the solar cells 110. By setting the width of the shading area 125 to be greater than the gap between adjacent solar cells 110, the alignment difficulty between the third shading layer 105 and the photovoltaic module can be reduced, and the risk of the third shading layer 105 being misaligned with the gap due to errors in processing, installation, etc., resulting in the gap being exposed, can be reduced. This can ensure that the surface of the photovoltaic module is the same or similar color as much as possible, and improve the aesthetics of the photovoltaic module as much as possible.

[0075] In some embodiments, the difference between the width of the light-shielding area 125 and the gap between adjacent solar cells 110 can be 5 to 8 mm, such as 6 mm, 6.3 mm, 6.7 mm, 7.2 mm, 7.5 mm, or 7.9 mm, etc. Regarding the width of the light-shielding area 125, the larger the width of the light-shielding area 125, the stronger the ability of the third shielding layer 105 to shield the solar cells 110. However, for the third shielding layer 105, the larger the width of the light-shielding area 125, the larger the area of ​​light absorption of the solar cells 110 that is shielded. Therefore, by setting the difference between the width of the light-shielding area 125 and the gap between adjacent solar cells 110 to be 5 to 8 mm, the ability to shield the solar cells 110 can be improved while reducing and avoiding shielding too much of the light absorption area of ​​the solar cells 110, thus avoiding affecting the photoelectric conversion efficiency of the solar cells 110.

[0076] The third shading layer 105 can be directly covered on the surface of the cell string 100, thereby reducing the difficulty of the third shading layer 105 shading the gaps between the connected cells 110 and improving the aesthetics of the photovoltaic module.

[0077] In some embodiments, the battery string 100 includes a front side and a back side, with the third shading layer 105 located on the back side of the battery string 100. It is understood that the third shading layer 105 is used to block the gap between adjacent battery cells 110. Therefore, placing the third shading layer 105 on the back side of the battery string 100 can reduce the impact of the third shading layer 105 on the light absorption of the battery string, preventing the third shading layer 105 from blocking too much light-absorbing area, thereby preventing the third shading layer 105 from affecting the photoelectric conversion efficiency of the solar cells.

[0078] In some embodiments, the third shading layer 105 may also have a color that is the same as or similar to the surface color of the solar cell 110. Thus, the third shading layer 105 needs to be positioned on the back of the solar cell string 100 to prevent it from affecting the light absorption of the solar cell 110, thereby reducing the overall manufacturing complexity while preventing the third shading layer 105 from affecting the performance of the photovoltaic module.

[0079] In some embodiments, the third shielding layer 105 can be part of the encapsulating film 106. That is, the encapsulating film 106 can include two layers stacked on top of each other. The layer closer to the solar cell 110 serves as the third shielding layer 105, which is used to shield the surface of the photovoltaic module, thereby making the surface color of the entire photovoltaic module uniform. The layer farther away from the solar cell 110 plays an encapsulation role.

[0080] Reference Figure 5 and Figure 6 In some embodiments, the encapsulating film 106 includes: a first encapsulating film layer 116, which faces the gap between adjacent battery cells 110 and has the same or similar color as the surface color of the battery cell 110; and a second encapsulating film layer 126, which covers the surface of the first encapsulating film layer 116 away from the battery cell. In other words, the encapsulating film 106 is configured as two layers, wherein the first encapsulating film layer 116 is used to block the gap between adjacent battery cells 110, and the second encapsulating film layer 126 covers the surface of the first encapsulating film layer 116, thereby performing the encapsulation function.

[0081] It should be noted that, for photovoltaic modules, photovoltaic modules may include a front encapsulating film and a back encapsulating film. The aforementioned encapsulating film 106 including a first encapsulating film layer 116 and a second encapsulating film layer 126 means that the front encapsulating film or the back encapsulating film includes a first encapsulating film layer 116 and a second encapsulating film layer 126.

[0082] It is understandable that during the manufacturing process of photovoltaic modules, there is a certain gap between the second encapsulating film layer 126 and the solar cell 110. During the subsequent lamination process, as the encapsulating film 106 melts, the second encapsulating film layer 126 will fill the gap, without affecting the appearance of the photovoltaic module. By setting the encapsulating film 106 to have two layers, it can simultaneously cover the gap between the connected solar cells 110, improving the aesthetics of the photovoltaic module, while also serving the function of encapsulation.

[0083] In some embodiments, the photovoltaic module may also include a cover plate 107 for covering the surface of the encapsulating film 106 away from the battery string 100.

[0084] In some embodiments, the cover plate 107 can be a glass cover plate, a plastic cover plate, or other cover plate with light-transmitting function. Specifically, the surface of the cover plate 107 facing the encapsulating film 106 can be an uneven surface, thereby increasing the utilization rate of incident light. The cover plate 107 includes a first cover plate and a second cover plate, the first cover plate being opposite to the first encapsulation layer, and the second cover plate being opposite to the second encapsulation layer.

[0085] In some embodiments, the first shielding layer 102 may also cover the surface of the cover plate 107 away from the battery string 100. It is understood that when the first shielding layer 102 covers the surface of the cover plate 107 away from the battery string 100, the first shielding layer 102 can be installed on the surface of the cover plate 107 in advance, thus reducing the process time during the subsequent manufacturing of photovoltaic modules. However, if the first shielding layer 102 is placed on the surface of the first busbar 101, it is not possible to install the first shielding layer 102 on the surface of the first busbar 101 in advance. This is because the first busbar 101 will undergo processing, such as welding, during the connection process between the first busbar 101 and the battery string. If the first shielding layer 102 is installed on the surface of the first busbar 101 in advance, it will be damaged during the installation of the first busbar 101. Installing the first shielding layer 102 on the surface of the cover plate 107 will not have this problem.

[0086] In some embodiments, the second shielding layer 103 may also cover the surface of the cover plate 107 away from the battery string 100. It is understood that when the second shielding layer 103 covers the surface of the cover plate 107 away from the battery string 100, the second shielding layer 103 can be installed on the surface of the cover plate 107 in advance, thus reducing the process time during the subsequent manufacturing of photovoltaic modules. However, if the second shielding layer 103 is placed on the surface of the battery string 100, it is not possible to install the second shielding layer 103 on the surface of the battery string 100 in advance. This is because the first busbar 101 will undergo processing, such as welding, during the connection process between the first busbar 101 and the battery string. If the second shielding layer 103 is installed on the surface of the battery string 100 in advance, it will be damaged during the installation of the first busbar 101. Installing the second shielding layer 103 on the surface of the cover plate 107 will not have this problem.

[0087] In some embodiments, the cover plate 107 includes a first cover plate and a second cover plate, a first shielding layer 102 may cover the surface of the first cover plate, and a second shielding layer 103 may cover the surface of the second cover plate.

[0088] In some embodiments, the third shading layer 105 may also be disposed on the surface of the cover plate 107 away from the battery string 100, in the same principle as the first shading layer 102 and / or the second shading layer 103. By disposing the third shading layer 105 on the surface of the cover plate 107, the manufacturing process time of the photovoltaic module can be reduced, thereby reducing the cost of the photovoltaic module.

[0089] In this embodiment, the battery string 100 serves as the current generation carrier of the photovoltaic module. The first busbar 101 is used to collect the charge carriers on the battery string 100 and serve as the output port. The first shielding layer 102 is used to shield the first busbar 101, and the first shielding layer 102 is the same or similar in color to the surface of the battery cell 110, thereby avoiding excessive color difference between the first busbar 101 and the battery string 100. The second shielding layer 103, which is the same or similar in color to the surface of the battery cell 110, is also used to improve the color uniformity of the photovoltaic module. Moreover, the second shielding layer 103 only shields one side of the surface of the battery string 100, and the other side of the battery string 100 can be used to connect with adjacent photovoltaic modules, thereby improving the aesthetics of the photovoltaic module while reducing costs.

[0090] Another embodiment of this disclosure also provides a photovoltaic component, which may include the photovoltaic modules in some or all of the above embodiments. The following will describe a photovoltaic component provided in another embodiment of this disclosure. It should be noted that the same or corresponding parts as those in the foregoing embodiments can be referred to the corresponding descriptions of the foregoing embodiments, which will not be repeated below.

[0091] refer to Figures 7 to 9 , Figure 7 This is a schematic diagram of a photovoltaic module overlapping structure provided in one embodiment of the present disclosure; Figure 8 This is a schematic diagram of the structure of a photovoltaic component provided in one embodiment of the present disclosure; Figure 9 for Figure 8 Enlarged schematic diagram of the structure within the dashed box.

[0092] In some embodiments, the photovoltaic component may include: a mounting bracket 11, which is fixedly connected to the roof 12 and has a limiting space.

[0093] In some embodiments, the photovoltaic component may include: a plurality of photovoltaic modules 10 as described in some or all of the above embodiments, with adjacent photovoltaic modules 10 overlapping vertically and the photovoltaic modules 10 snapped into a limiting space.

[0094] Multiple mounting brackets 11 and multiple photovoltaic modules 10 together constitute a photovoltaic component. The photovoltaic modules 10 are installed on the roof 12 via the mounting brackets 11. Specifically, the roof 12 is provided with multiple drainage strips 13 extending along the inclined direction of the roof 12 and multiple mounting brackets 11 perpendicular to the drainage strips 13. The drainage strips 13 are fixed to the roof 12 with steel nails, and the mounting brackets 11 are then fixed to the drainage strips 13 with steel nails. The mounting brackets 11 are fixed to the roof 12 with screws or other fixing parts. The photovoltaic modules 10 are detachably connected to the mounting brackets 11 to install the photovoltaic modules 10 onto the roof. In this structure, the photovoltaic modules 10 can replace some of the original traditional tiles on the roof 12 and be used directly as the building material of the roof 12, which can save the cost of the roof 12 and reduce the load-bearing requirements of the roof 12.

[0095] The mounting bracket 11 is provided with a limiting space. At least a portion of the first frame 21 of the same photovoltaic module 10 is accommodated in the limiting space of one mounting bracket 11, and at least a portion of the second frame 22 is accommodated in the limiting space of another adjacent mounting bracket 11. This facilitates the connection of the two adjacent mounting brackets 11 to the first frame 21 and the second frame 22, respectively, so that the photovoltaic module 10 can be stably installed on the roof 12.

[0096] In this embodiment, two adjacent mounting brackets 11 are respectively engaged with the first frame 21 and the second frame 22 of the same photovoltaic module 10, restricting the movement of the photovoltaic module 10 and improving the installation stability of the photovoltaic module 10, thereby enhancing the wind resistance of each photovoltaic module 10. Furthermore, the photovoltaic module 10 and the mounting brackets 11 are connected through a limiting structure, eliminating the need for screws or similar fixing parts, thus facilitating the installation and removal of individual photovoltaic modules 10 and increasing the efficiency of installation and removal.

[0097] By setting the mounting bracket 11, the photovoltaic module 10 can be fixed on the roof 12 to provide power to the house. Moreover, for the photovoltaic module 10, adjacent photovoltaic modules 10 overlap vertically, and the overlapping surface is the side of the photovoltaic module 10 away from the second shading layer 103. This allows the edge of the photovoltaic module 10 to be shaded by the first shading layer 102, the second shading layer 103 and the adjacent photovoltaic module 10, thereby making the surface color difference of the photovoltaic module 10 smaller.

[0098] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the embodiments of this disclosure. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the embodiments of this disclosure; therefore, the scope of protection of the embodiments of this disclosure should be determined by the scope defined in the claims.

Claims

1. A photovoltaic module, characterized by, The application relates to a photovoltaic module, comprising: a plurality of battery strings arranged along a first direction, the battery strings comprising a plurality of battery pieces arranged along a second direction; a first busbar extending along the first direction and electrically connected with the plurality of battery strings arranged along the first direction; a first shielding layer extending along the first direction and located on the first busbar and opposite to the first busbar; a second shielding layer extending along the second direction and located on one side of the battery string in the first direction, and the second shielding layer is connected with the first shielding layer; wherein the surface of the first shielding layer and the surface of the second shielding layer are the same as or similar to the surface color of the battery piece; further comprising: a second busbar extending along the second direction, the second busbar being electrically connected with the plurality of battery pieces of the battery string arranged along the second direction, the second busbar being electrically connected with the first busbar, and at least part of the second busbar being opposite to the second shielding layer; further comprising: an encapsulating adhesive film used for covering the surface of the battery string, the first shielding layer and the second shielding layer; the encapsulating adhesive film comprises: a first adhesive film layer opposite to the gap between adjacent battery pieces, and the color of the first adhesive film layer is the same as or similar to the surface color of the battery piece; and a second adhesive film layer covering the surface of the first adhesive film layer away from the battery piece.

2. The photovoltaic module of claim 1, wherein, In the second direction, the width of the second shielding layer is greater than that of the second busbar.

3. The photovoltaic module of claim 1, wherein, Further comprising: a third shielding layer comprising a light-transmitting area opposite to the battery piece and a light-blocking area opposite to the gap between adjacent battery pieces, and the surface of the light-blocking area is the same as or similar to the surface color of the battery piece.

4. The photovoltaic module of claim 3, wherein, In the second direction, the width of the light-blocking area is greater than the gap between adjacent battery pieces, and the difference between the width of the light-blocking area and the gap between adjacent battery pieces is 5-8 mm.

5. The photovoltaic module of claim 3, wherein, The battery string comprises opposite front and back surfaces, and the third shielding layer is located on the back surface of the battery string.

6. The photovoltaic module of claim 1, wherein, The color of the first busbar is the same as or similar to the surface color of the battery piece.

7. A photovoltaic component, characterized by The application further relates to a photovoltaic module, comprising: a mounting hanger fixedly connected with a roof, and a limiting space arranged on the mounting hanger; a plurality of photovoltaic modules according to any one of claims 1-6, and adjacent photovoltaic modules are overlapped, and the photovoltaic modules are clamped in the limiting space.

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