Photovoltaic module and photovoltaic component

Abstract

The embodiment of the disclosure relates to the photovoltaic field, and provides a photovoltaic module and a photovoltaic component wherein the photovoltaic module comprises: a plurality of battery strings arranged along a first direction, each battery string comprising a plurality of battery pieces arranged along a second direction; the bus bar extends along the first direction and is electrically connected with the plurality of battery strings arranged along the first direction; the first shielding layer extends along the first direction, is positioned on the bus bar and is opposite to the bus bar; the second shielding layer is in a net shape, the net-shaped second shielding layer comprises first connecting lines extending in the first direction and second connecting lines extending in the second direction, the first connecting lines directly face gaps between the battery pieces arranged in the second direction, and the second connecting lines directly face gaps between the battery pieces arranged in the first direction; wherein the surface of the first shielding layer and the surface of the second shielding layer have the same or similar color as the surface of the battery piece. And the aesthetic degree of the photovoltaic module can be improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the photovoltaic field, and in particular to a photovoltaic module and a photovoltaic component. Background Art

[0002] Solar cells are a type of photoelectric semiconductor sheet that uses sunlight to generate electricity directly. They are also called "solar chips" or "photovoltaics". As long as they are illuminated under certain conditions, they can instantly output voltage and generate current in a circuit. In physics, this is called solar photovoltaic (PV), or photovoltaic for short.

[0003] Photovoltaic modules generally refer to solar cell modules. Since the output voltage of a single solar cell is low, a certain number of single cells must be sealed in series or parallel to form a photovoltaic module. Summary of the invention

[0004] The embodiments of the present disclosure provide a photovoltaic module and a photovoltaic component, which can at least improve the aesthetics of the photovoltaic module.

[0005] According to some embodiments of the present disclosure, on one hand, an embodiment of the present disclosure provides a photovoltaic module, comprising: a plurality of battery strings arranged along a first direction, the battery strings comprising a plurality of battery cells arranged along a second direction; a bus bar, the bus bar extending along the first direction and electrically connected to the plurality of battery strings arranged along the first direction; a first shielding layer, the first shielding layer extending along the first direction and being located on the bus bar and facing the bus bar; a second shielding layer, the second shielding layer being mesh-shaped, the mesh-shaped second shielding layer comprising a first connecting line extending along the first direction and a second connecting line extending along the second direction, the first connecting line facing the gap between the battery cells arranged along the second direction, and the second connecting line facing the gap between the battery cells arranged along the first direction; wherein the surface of the first shielding layer and the surface of the second shielding layer are the same or similar in color to the surface of the battery cells.

[0006] In some embodiments, the bus bar includes: a first bus bar, which is located on one side of the battery string along the second direction and is electrically connected to all battery strings; and a second bus bar, which is located on the other side of the battery string along the second direction and is electrically connected to part of the battery strings.

[0007] In some embodiments, the first shielding layer includes: a first sub-shielding layer, the first sub-shielding layer is located on the top surface of the first bus bar; a second sub-shielding layer, the second sub-shielding layer is located on the top surface of the second bus bar, and in the second direction, the width of the first sub-shielding layer is greater than the width of the second sub-shielding layer.

[0008] In some embodiments, the battery string includes a front side and a back side opposite to each other along a third direction, the first shielding layer is located on the front side, and the second shielding layer is located on the back side.

[0009] In some embodiments, along the second direction, the difference between the width of the first connecting line and the gap between adjacent battery cells is 5 to 8 mm, and along the first direction, the difference between the width of the second connecting line and the gap between adjacent battery cells is 5 to 8 mm.

[0010] In some embodiments, it further includes: a card connection space, the card connection space is located on a side of the first shielding layer away from the battery string, and the card connection space is used to connect different photovoltaic components.

[0011] In some embodiments, along the first direction, the width of the locking space is less than or equal to 60 mm.

[0012] In some embodiments, along the first direction, the width of the locking space is less than or equal to 60 mm.

[0013] In some embodiments, along the first direction, the width of the locking space is less than or equal to 60 mm.

[0014] According to some embodiments of the present disclosure, on the other hand, a photovoltaic assembly is provided, comprising: a mounting hanger, which is fixedly connected to a roof and has a limiting space on the mounting hanger; a plurality of photovoltaic assemblies as described in part or all of the above, and adjacent photovoltaic assemblies are overlapped up and down, and the photovoltaic assemblies are snapped into the limiting space.

[0015] The technical solution provided by the embodiments of the present disclosure has at least the following advantages:

[0016] The battery string serves as the current generating carrier of the photovoltaic module, the bus bar is used to collect the carriers on the battery string and serve as the output port, the first shielding layer is used to shield the bus bar, and the first shielding layer is the same or similar in color to the surface of the battery cell, so as to avoid excessive color difference between the bus bar surface and the battery string. At the same time, a second shielding layer is also provided, and the second shielding layer is used to shield the gaps between the battery cells, so that the surface of the photovoltaic module is as consistent in color as possible, and by setting the second shielding layer in a mesh shape, it is also possible to avoid the second shielding layer shielding the surface of the battery cell, thereby reducing the possibility of setting the second shielding layer to shield the surface of the battery cell, thereby avoiding the second shielding layer affecting the photoelectric conversion efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A top view of a photovoltaic assembly provided by an embodiment of the present disclosure;

[0019] Figure 2 Another top view of a photovoltaic assembly provided by an embodiment of the present disclosure;

[0020] Figure 3 A top view of a second shielding layer provided in an embodiment of the present disclosure;

[0021] Figure 4 A three-dimensional diagram of a battery string provided in one embodiment of the present disclosure;

[0022] Figure 5 A cross-sectional view of a photovoltaic module provided by an embodiment of the present disclosure;

[0023] Figure 6 A schematic diagram of a photovoltaic module connection structure provided by an embodiment of the present disclosure;

[0024] Figure 7 A schematic structural diagram of a photovoltaic component provided in one embodiment of the present disclosure;

[0025] Figure 8 A schematic diagram of an enlarged structure provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] As known from the background technology, currently, the color of the first bus bar is usually silver, and the color of the battery cell is blue or black. When the photovoltaic module is viewed from the front, the color difference between the first bus bar and the battery cell is large.

[0027] The disclosed embodiment provides a photovoltaic module, wherein a battery string serves as a current generating carrier of the photovoltaic module, a bus bar is used to collect carriers on the battery string and serves as an output port, a first shielding layer is used to shield the bus bar, and the first shielding layer is the same or similar in color to the surface of the battery cell, so as to avoid excessive color difference between the bus bar surface and the battery string, and at the same time, a second shielding layer is provided, and the second shielding layer is used to shield the gaps between the battery cells, so as to make the surface of the photovoltaic module as consistent in color as possible, and by providing the second shielding layer in a mesh shape, it is also possible to avoid the second shielding layer shielding the surface of the battery cell, thereby reducing the possibility of providing the second shielding layer to shield the surface of the battery cell, thereby preventing the second shielding layer from affecting the photoelectric conversion efficiency of the battery cell.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] In the accompanying drawings corresponding to the embodiments of the present application, the thickness and area of ​​the layer are magnified for better understanding and ease of description. When describing a component (such as a layer, film, region or substrate) on another component or on the surface of another component, the component can be "directly" located on the surface of the other component, or a third component can be present between the two components. On the contrary, when describing a component on the surface of another component or when another component is formed or provided on the surface of a component, it means that there is no third component between the two components. In addition, when describing a component as "substantially" 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 partial edge of the entire surface.

[0035] In the description of the embodiments of the present application, when a component "includes" another component, unless otherwise specified, other components are not excluded, and other components may be further included. In addition, when a component such as a layer, a film, a region, or a plate is referred to as being "on / located on" another component, it may be "directly on" the other component (i.e., located on the surface of the other component with no other components between them), or another component may exist in between. In addition, when a component such as a layer, a film, a region, a plate, etc. is "directly located on" another component, or when a component such as a layer, a film, a region, a plate, etc. is located on the surface of another component, it means that no other components are located in between.

[0036] The terms used in the description of the various embodiments described herein are only used to describe specific embodiments and are not intended to be limiting. As used in the description of the various embodiments described and in the appended claims, "the components" are also intended to include plural forms unless the context clearly indicates otherwise. Among them, components include components such as layers, films, regions, or plates.

[0037] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable the reader to better understand the embodiments of the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the embodiments of the present disclosure can be implemented.

[0038] refer to Figures 1 to 5 , Figure 1 A top view of a photovoltaic assembly provided by an embodiment of the present disclosure; Figure 2 Another top view of a photovoltaic assembly provided by an embodiment of the present disclosure; Figure 3 A top view of a second shielding layer provided in an embodiment of the present disclosure;

[0039] Figure 4 A three-dimensional diagram of a battery string provided in one embodiment of the present disclosure; Figure 5 for Figure 4 A cross-sectional view along the M2 direction; it should be noted that, in order to facilitate understanding and to improve the clarity of the diagram, Figure 1 The first shielding layer and the second shielding layer are not shown. Figure 3 Only the second shielding layer is shown. Figure 4 The packaging film and cover plate are not shown.

[0040] In some embodiments, the photovoltaic module may include: a plurality of battery strings 100 arranged along a first direction X, and the battery string 100 includes a plurality of battery cells 110 arranged along a second direction Y.

[0041] The photovoltaic module may further include a bus bar 101 extending along a first direction X and electrically connected to the plurality of battery strings 100 arranged along the first direction X.

[0042] The photovoltaic module may further include: a first shielding layer 102 , the first shielding layer 102 extends along the first direction X, and is located on the bus bar 101 and directly opposite to the bus bar 101 .

[0043] The photovoltaic module may also include: a second shielding layer 103, the second shielding layer 103 is in a mesh shape, the mesh second shielding layer 103 includes a first connecting line 113 extending along the first direction X and a second connecting line 123 extending along the second direction Y, the first connecting line 113 is opposite to the gap between the battery cells 110 arranged along the second direction Y, and the second connecting line 123 is opposite to the gap between the battery cells 110 arranged along the first direction X; wherein the surface of the first shielding layer 102 and the surface of the second shielding layer 103 are the same or similar in color to the surface of the battery cell 110.

[0044] In the disclosed embodiment, the battery string 100 serves as a current generating carrier of the photovoltaic module, the bus bar 101 is used to collect the carriers on the battery string 100 and serve as an output port, the first shielding layer 102 is used to shield the bus bar 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 surface of the bus bar 101 and the battery string 100. At the same time, a second shielding layer 103 is also provided, and the second shielding layer 103 is used to shield the gaps between the battery cells 110, thereby making the surface of the photovoltaic module as consistent in color as possible. Moreover, by providing the second shielding layer 103 in a mesh shape, it is also possible to avoid the second shielding layer 103 shielding the surface of the battery cell 110, thereby reducing the possibility of the second shielding layer 103 shielding the surface of the battery cell 110, thereby avoiding the second shielding layer 103 affecting the photoelectric conversion efficiency of the battery cell 110.

[0045] In some embodiments, the battery string 100 may include a plurality of battery cells 110 and a welding ribbon 120 for connecting adjacent battery cells in series, wherein the battery cells 110 include, but are not limited to, PERC cells (Passivated Emitter Rear Cell), IBC (Interdigitated Back Contact), TOPCon cells (Tunnel Oxide Passivated Contact), HIT / HJT cells (Heterojunction Technology), solar thin film cells, and stacked cells, or any combination thereof. Among them, solar thin film cells include, but are not limited to, perovskite solar thin film cells, copper indium selenide solar thin film cells, gallium arsenide solar thin film cells, and cadmium sulfide solar thin film cells. Stacked cells include, but are not limited to, perovskite cells superimposed on crystalline silicon cells, perovskite cells superimposed on perovskite cells, and perovskite cells superimposed on thin film cells; the welding ribbon 120 is usually a tinned copper ribbon or a tin-coated copper ribbon, which is used to electrically connect adjacent battery cells 110.

[0046] The busbar 101 is usually made of copper or other conductive materials, and has good conductivity and corrosion resistance. The present embodiment does not limit the material of the busbar 101, and other materials that can be used as the first busbar can also be applied to the present embodiment.

[0047] In some embodiments, the color of the busbar 101 may be the same or similar to the color of the surface of the cell 110. By changing the color of the busbar 101, the color of the surface of the photovoltaic module can be made consistent when the first shielding layer 102 does not completely shield the busbar 101, thereby further improving the aesthetics of the photovoltaic module.

[0048] It should be noted that in the embodiments of the present disclosure, the same color means: the color difference value of the two colors is less than or equal to 0.5NBS; similar colors mean: the color difference value of the two colors is greater than 0.5NBS and less than or equal to 1NBS. Taking the color of the surface of the battery cell 110 as black as an example, the color of the surface of the bus bar 101 can also be black, and the color difference value between the black surface of the bus bar 101 and the black surface of the battery cell is less than or equal to 1NBS.

[0049] refer to Figure 1 In some embodiments, the bus bar 101 includes: a first bus bar 111, the first bus bar 111 is located on one side of the battery string 100 along the second direction Y, and the first bus bar 111 is electrically connected to all the battery strings 100; a second bus bar 121, the second bus bar 121 is located on the other side of the battery string 100 along the second direction Y, and the second bus bar 121 is electrically connected to part of the battery strings 100. In other words, for the busbar 101 of the photovoltaic module, the busbars 101 on both sides of the photovoltaic module along the second direction Y are set to have different lengths, wherein the long busbar is electrically connected to all the battery strings 100 as the first busbar 111, and the short busbar 101 is electrically connected to only some of the battery strings 100 as the second busbar 121. All the battery strings 100 are connected in parallel through the first busbar 111, and some of the battery strings 100 are connected in series through the second busbar 121. In this way, the power generation of the photovoltaic module can be controlled, the voltage and current of the photovoltaic module can be balanced, and it can also be convenient for the lead wires to come out from the middle of the photovoltaic module.

[0050] Taking a photovoltaic module containing four battery strings as an example, the first bus bar 111 can connect the four battery strings 100 in parallel, the number of second bus bars 121 can be two, and one second bus bar 121 connects two battery strings 100 in series, thereby forming a connection mode of four strings in parallel and two strings in series, so that the voltage and current of the photovoltaic module can be controlled.

[0051] refer to Figure 1 and Figure 2The first shielding layer 102 is used to shield the surface of the bus bar 101, so that the entire photovoltaic module appears to be uniform in color from the surface, for example, it appears to be black as a whole, or the first shielding layer 102 is used to reduce the area of ​​different colors on the surface of the photovoltaic module, thereby improving the aesthetics of the photovoltaic module.

[0052] The first shielding layer 102 may be formed by sticking tape or coating.

[0053] In some embodiments, the first shielding layer 102 can directly cover the surface of the bus bar 101. By directly covering the surface of the bus bar 101, on the one hand, the installation of the first shielding layer 102 can be facilitated, and on the other hand, the installation accuracy of the first shielding layer 102 can be improved, thereby avoiding the situation where the first shielding layer 102 cannot completely cover the bus bar 101, thereby improving the reliability of the first shielding layer 102 covering the entire surface of the bus bar 101.

[0054] refer to Figure 2 and Figure 5 In some embodiments, the photovoltaic module may further include a cover plate 107 , and the first shielding layer 102 may be adhered to the surface of the cover plate 107 away from the battery cell 110 , or may be coated on the surface of the cover plate 107 away from the battery cell 110 .

[0055] refer to Figure 1 and Figure 2 In some embodiments, the first shielding layer 102 may include: a first sub-shielding layer 112, the first sub-shielding layer 112 is located on the top surface of the first bus bar 111; a second sub-shielding layer 122, the second sub-shielding layer 122 is located on the top surface of the second bus bar 121, and in the second direction Y, the width of the first sub-shielding layer 112 is greater than the width of the second sub-shielding layer 122.

[0056] The first sub-shielding layer 112 is used to shield the first bus bar 111, and the second sub-shielding layer 122 is used to shield the second bus bar 121. Moreover, the width of the first sub-shielding layer 112 is set to be greater than the width of the second sub-shielding layer 122. This can reduce the material usage of the first shielding layer 102 while shielding the first bus bar 111 and the second bus bar 121.

[0057] It is understandable that for photovoltaic modules, photovoltaic modules need to cooperate with other photovoltaic modules. Therefore, space must be reserved on the surface of the photovoltaic modules, and the first sub-shielding layer 112 is used to block this reserved space to ensure that the surface color of the entire photovoltaic module remains consistent.

[0058] In some embodiments, in the second direction Y, the width of the first sub-shielding layer 112 is greater than the width of the first bus bar 111. In this way, the first bus bar 111 can be easily shielded by the first sub-shielding layer 112, thereby reducing the difficulty of aligning the first sub-shielding layer 112 with the first bus bar 111; in the second direction Y, the width of the second sub-shielding layer 122 is greater than the width of the second bus bar 121. Similarly, the second sub-shielding layer 122 can be easily shielded by the second sub-shielding layer 122, thereby reducing the difficulty of aligning the second sub-shielding layer 122 with the second bus bar 121.

[0059] Combined with reference Figures 1 to 3 In some embodiments, a light-transmitting area 133 is formed between the first connecting line 113 and the second connecting line 123 of the second shielding layer 103. The light-transmitting area 133 is directly opposite to the battery cell 110. The light-transmitting area 133 avoids affecting the light absorption of the battery cell 110, thereby avoiding affecting the photoelectric conversion efficiency of the battery cell 110.

[0060] In some embodiments, the light-transmitting area 133 may be a transparent film layer or a hole. If the light-transmitting area 133 is a transparent film layer, then in the process of forming the second shielding layer 103, additional pigments may be added when forming the first connecting wires 113 and the second connecting wires 123, so that the surface color of the first connecting wires 113 and the second connecting wires 123 is the same as or similar to the surface color of the battery cell 110. If the position corresponding to the light-transmitting area 133 is a hole, then in the process of forming the second shielding layer 103, the entire second shielding layer 103 is first formed, and then the second shielding layer 103 at a part of the position is removed so that the second shielding layer 103 is in a mesh shape, and the mesh is directly opposite to the battery cell 110, and this removed part serves as the light-transmitting area 133 of the second shielding layer 103.

[0061] In some embodiments, the first connection line 113 and the second connection line 123 may be an integrated structure.

[0062] In some embodiments, the material of the second shielding layer 103 can be PVB film, EVA film or PET film, etc. The color of the second shielding layer 103 can be the same as or similar to the color of the surface of the battery cell 110. For example, taking the color of the surface of the battery cell 110 as black, the color of the surface of the second shielding layer 103 can also be black, and the color difference between the black surface of the second shielding layer 103 and the black surface of the battery cell 110 is less than or equal to 1NBS.

[0063] In some embodiments, the width of the first connecting line 113 in the second direction Y is greater than the gap between adjacent battery cells 110, and the width of the second connecting line 123 in the first direction X is greater than the gap between adjacent battery cells 110. By setting the width of the first connecting line 113 in the second direction Y to be greater than the gap between adjacent battery cells 110, and the width of the second connecting line 123 in the first direction X to be greater than the gap between adjacent battery cells 110, the ability of the second shielding layer 103 to shield the gap between the battery cells 110 can be improved, so that the surface of the photovoltaic module can present the same color as much as possible, thereby improving the aesthetics of the photovoltaic module.

[0064] In some embodiments, along the second direction Y, the difference between the width of the first connection line 113 and the gap between adjacent cells 110 is 5 to 8 mm, and along the first direction X, the difference between the width of the second connection line 123 and the gap between adjacent cells 110 is 5 to 8 mm. By setting the difference between the width of the first connection line 113 and the gap between adjacent cells 110 along the second direction Y to be 5 to 8 mm, and the difference between the width of the second connection line 123 and the gap between adjacent cells 110 along the first direction X to be 5 to 8 mm, the risk of the second shielding layer 103 and the gap being exposed due to errors in the processing and installation process is reduced, so that the surface of the photovoltaic module can be guaranteed to be the same or similar color as much as possible, and the aesthetics of the photovoltaic module can be improved as much as possible.

[0065] For the first connecting line 113, along the second direction Y, the difference between the width of the first connecting line 113 and the gap between adjacent battery cells 110 is 5 to 8 mm, for example, 6 mm, 6.3 mm, 6.7 mm, 7.2 mm, 7.5 mm or 7.9 mm, etc. The wider the width of the first connecting line 113, the stronger the ability of the first connecting line 113 to block the gap between the battery cells 110, and the more difficult it is to reduce the gap alignment between the first connecting line 113 and the battery cell 110. Similarly, the wider the width of the first connecting line 113, the larger the area of ​​the battery cell 110 that may be blocked, which will result in a reduction in the light receiving area of ​​the battery cell 110 and may affect the photoelectric conversion efficiency of the battery cell. Therefore, setting the difference between the width of the first connecting line 113 and the gap between adjacent battery cells 110 to 5 to 8 mm can improve the ability to block the battery cell 110 while reducing the area of ​​the battery cell 110 that absorbs too much light to avoid affecting the photoelectric conversion efficiency of the battery cell 110.

[0066] Similarly, for the second connecting line 123, along the first direction X, the difference between the width of the second connecting line 123 and the gap between adjacent battery cells 110 is 5 to 8 mm, for example, 6 mm, 6.3 mm, 6.7 mm, 7.2 mm, 7.5 mm or 7.9 mm, etc. The wider the width of the second connecting line 123, the stronger the ability of the second connecting line 123 to block the gap between the battery cells 110, and the more difficult it is to reduce the gap alignment between the second connecting line 123 and the battery cell 110. Similarly, the wider the width of the second connecting line 123, the larger the area of ​​the battery cell 110 that may be blocked, which will result in a reduction in the light-receiving area of ​​the battery cell 110, which may affect the photoelectric conversion efficiency of the battery cell. Therefore, setting the difference between the width of the second connecting line 123 and the gap between adjacent battery cells 110 to 5 to 8 mm can improve the ability to block the battery cell 110 while reducing the area of ​​the battery cell 110 that absorbs too much light to avoid affecting the photoelectric conversion efficiency of the battery cell 110.

[0067] The second shielding layer 103 can directly cover the surface of the battery string 100, so as to reduce the difficulty of the second shielding layer 103 shielding the gaps between the connected battery cells 110, thereby improving the aesthetics of the photovoltaic module.

[0068] In some embodiments, the battery string 100 includes a front side and a back side that are opposite to each other along a third direction Z, the first shielding layer 102 is located on the front side, and the second shielding layer 103 is located on the back side. It can be understood that the first shielding layer 102 is used to shield the bus bar 101, and the second shielding layer 103 is used to shield the gap between the battery cells 110. Therefore, for the first shielding layer 102, in order to improve the aesthetics of the photovoltaic module, it is necessary to make the front color of the photovoltaic module uniform. Therefore, it is necessary to control the first shielding layer 102 to be located on the front side, so as to shield the color of the surface of the bus bar 101. For the second shielding layer 103, setting the second shielding layer 103 on the back side can also achieve the effect of shielding the gap between the battery cells 110. Moreover, setting the second shielding layer 103 on the back side can reduce the influence of the second shielding layer 103 on the light absorption of the battery string, avoid the second shielding layer 103 blocking too much light absorption area, and thus avoid the second shielding layer 103 affecting the photoelectric conversion efficiency of the solar cell.

[0069] refer to Figure 1 and Figure 2 In some embodiments, the photovoltaic module may further include: a snap-in space 104, which is located on a side of the first shielding layer 102 away from the battery string 100, and is used to connect different photovoltaic modules. By providing the snap-in space 104 in the photovoltaic module, snap-in between photovoltaic modules can be facilitated, thereby facilitating assembly and matching between photovoltaic modules.

[0070] In some embodiments, the surface of the snap-in space 104 is also covered by the first sub-shielding layer 112. It can be understood that for the snap-in space 104, since the combination or installation method of each photovoltaic component may be different, the first sub-shielding layer 112 is set to cover the surface of the snap-in space 104. Therefore, the consistency of the color of the surface of the photovoltaic component can be improved, thereby improving the aesthetics of the photovoltaic component and facilitating the snap-in between the photovoltaic components.

[0071] In some embodiments, the width of the snap-in space 104 is less than or equal to 60 mm along the first direction X. It is understandable that, for the snap-in space 104, the larger the width of the snap-in space 104, the easier it is to snap-in adjacent photovoltaic modules. Similarly, the larger the width of the snap-in space 104, the larger the overall size of the photovoltaic module, which will increase the cost of the photovoltaic module. Therefore, setting the width of the snap-in space 104 to be less than or equal to 60 mm can facilitate the snap-in between photovoltaic modules while controlling the cost of the photovoltaic module.

[0072] refer to Figure 5 In some embodiments, the photovoltaic module may further include an encapsulation film 106, which may include a first encapsulation layer (not shown) and a second encapsulation layer (not shown), wherein the first encapsulation layer covers one of the front side or the back side of the battery cell, and the second encapsulation layer covers the other of the front side or the back side of the battery cell. Specifically, at least one of the first encapsulation layer or the second encapsulation layer may be an organic encapsulation film such as a polyvinyl butyral (PVB) film, an ethylene-vinyl acetate copolymer (EVA) film, a polyethylene-octene co-elastomer (POE) film, or a polyethylene glycol terephthalate (PET) film.

[0073] It is understandable that the first packaging layer and the second packaging layer have a dividing line before the lamination process. After the lamination process, there will no longer be the concept of the first packaging layer and the second packaging layer in the formed photovoltaic module, that is, the first packaging layer and the second packaging layer have formed an integral packaging film 106.

[0074] Combined with reference Figure 2 and Figure 5In some embodiments, the first shielding layer 102 can be used as a part of the packaging film 106. In other words, the packaging film 106 has a two-layer structure, in which a layer close to the battery cell 110 is used as the first shielding layer 102, and a layer away from the battery cell 110 is used as the packaging layer of the photovoltaic module. By using the first shielding layer 102 as a part of the packaging film 106, the process steps of forming the photovoltaic module can be reduced, thereby reducing the cost of the photovoltaic module.

[0075] It should be noted that, for a photovoltaic module, the photovoltaic module may include a front packaging film and a back packaging film, and the packaging film 106 as a two-layer structure means that the front packaging film or the back packaging film includes a two-layer structure.

[0076] In some embodiments, the second shielding layer 103 can be used as a part of the encapsulation film 106. In other words, the encapsulation film 106 has a two-layer structure, in which a layer close to the battery cell 110 is used as the second shielding layer 103, and a layer away from the battery cell 110 is used as the encapsulation layer of the photovoltaic module. By using the second shielding layer 103 as a part of the encapsulation film 106, the process steps of forming the photovoltaic module can be reduced, thereby reducing the cost of the photovoltaic module.

[0077] In some embodiments, the photovoltaic module may further include a cover plate 107 , and the cover plate 107 is used to cover the surface of the packaging film 106 away from the battery string 100 .

[0078] In some embodiments, the cover plate 107 may be a glass cover plate, a plastic cover plate or the like with a light-transmitting function. Specifically, the surface of the cover plate 107 facing the encapsulation film 106 may be a concave-convex surface, thereby increasing the utilization rate of the incident light. The cover plate 107 includes a first cover plate and a second cover plate, the first cover plate is opposite to the first encapsulation layer, and the second cover plate is opposite to the second encapsulation layer.

[0079] In some embodiments, the first shielding layer 102 can cover the surface of the cover plate 107. Compared with the solution in which the first shielding layer covers the surface of the bus bar 101, setting the first shielding layer 102 to cover the surface of the cover plate 107 can reduce the production time of the photovoltaic module. Before installing the cover plate 107 of the photovoltaic module, the first shielding layer 102 can be pre-covered on the surface of the cover plate 107, thereby reducing the process steps for producing the photovoltaic module and reducing the cost of the photovoltaic module.

[0080] If the first shielding layer 102 is set on the surface of the busbar 101, the first shielding layer 102 cannot be installed on the surface of the busbar 101 in advance, because, during the process of connecting the busbar 101 with the battery string 100, the busbar 101 will also be processed, such as welding. If the first shielding layer 102 is installed on the surface of the busbar 101 in advance, the first shielding layer 102 will be damaged when the busbar 101 is installed. If the first shielding layer 102 is installed on the surface of the cover plate 107, there will be no such problem.

[0081] In some embodiments, the cover plate 107 includes a first cover plate and a second cover plate. The first shielding layer 102 may cover the surface of the first cover plate, and the second shielding layer 103 may cover the surface of the second cover plate.

[0082] In the disclosed embodiment, the battery string 100 serves as a current generating carrier of the photovoltaic module, the bus bar 101 is used to collect the carriers on the battery string 100 and serve as an output port, the first shielding layer 102 is used to shield the bus bar 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 surface of the bus bar 101 and the battery string 100. At the same time, a second shielding layer 103 is also provided, and the second shielding layer 103 is used to shield the gaps between the battery cells 110, thereby making the surface of the photovoltaic module as consistent in color as possible. Moreover, by providing the second shielding layer 103 in a mesh shape, it is also possible to avoid the second shielding layer 103 shielding the surface of the battery cell 110, thereby reducing the possibility of the second shielding layer 103 shielding the surface of the battery cell 110, thereby avoiding the second shielding layer 103 affecting the photoelectric conversion efficiency of the battery cell 110.

[0083] Another embodiment of the present disclosure further provides a photovoltaic component, which may include some or all of the photovoltaic components in the above-mentioned embodiments. The photovoltaic component provided by another embodiment of the present disclosure will be described below. It should be noted that the same or corresponding parts of the above-mentioned embodiments can refer to the corresponding description of the above-mentioned embodiments and will not be repeated below.

[0084] refer to Figures 6 to 8 , Figure 6 A schematic diagram of a photovoltaic module connection structure provided by an embodiment of the present disclosure. Figure 7 A schematic diagram of the structure of a photovoltaic component provided by an embodiment of the present disclosure is shown in FIG. Figure 8 for Figure 7 The enlarged schematic diagram of some structures in the dotted box; Figure 6 For the general Figure 7 A schematic diagram of the structure after all fixed structures in the figure are hidden.

[0085] refer to Figure 6 and Figure 7In some embodiments, the photovoltaic component may include: a mounting hanger 11, the mounting hanger 11 is fixedly connected to the roof 12, and a limiting space is provided on the mounting hanger 11.

[0086] In some embodiments, the photovoltaic component may include: a plurality of photovoltaic modules 10 as described in some or all of the above embodiments, and adjacent photovoltaic modules 10 are overlapped up and down, and the photovoltaic modules 10 are clamped in the limited space.

[0087] A plurality of mounting hangers 11 and a plurality of photovoltaic modules 10 together constitute a photovoltaic component. The photovoltaic module 10 is installed on the roof 12 through the mounting hangers 11. Specifically, the roof 12 is provided with a plurality of water-adjusting strips 13 extending along the inclined direction of the roof 12 and a plurality of mounting hangers 11 perpendicular to the water-adjusting strips 13. The water-adjusting strips 13 are fixed to the roof 12 through steel nails, and the mounting hangers 11 are fixed to the water-adjusting strips 13 through steel nails. The mounting hangers 11 are fixed to the mounting hangers 11 through screws or other fixing parts, and the photovoltaic module 10 is detachably connected to the mounting hangers 11 to install the photovoltaic module 10 on the roof. In this structure, the photovoltaic module 10 can replace part of the original traditional tiles on the roof 12 and be directly used as a building material for the roof 12, which can save the cost of the roof 12 and reduce the load-bearing requirements of the roof 12.

[0088] The mounting hanger 11 is provided with a limited space, and at least a portion of the first frame 21 of the same photovoltaic component 10 is accommodated in the limited space of one mounting hanger 11, and at least a portion of the second frame 22 is accommodated in the limited space of another adjacent mounting hanger 11, so that the two adjacent mounting hangers 11 are respectively connected to the first frame 21 and the second frame 22, so that the photovoltaic component 10 can be stably installed on the roof 12.

[0089] In the disclosed embodiment, two adjacent mounting hangers 11 are respectively limited and matched with the first frame 21 and the second frame 22 of the same photovoltaic module 10, so as to limit the movement of the photovoltaic module 10, thereby improving the installation stability of the photovoltaic module 10, and thus improving the wind resistance of each photovoltaic module 10. In addition, the photovoltaic module 10 and the mounting hanger 11 are connected by a limiting structure, without the need for fixing parts such as screws, so that the installation and removal of a single photovoltaic module 10 is facilitated, and the installation and removal efficiency of the photovoltaic module 10 is higher.

[0090] By setting the installation hanger 11, the photovoltaic module 10 can be fixed on the roof 12 to provide power for the house. Moreover, for the photovoltaic module 10, adjacent photovoltaic modules 10 are overlapped up and down, and the overlapping surface is the side of the photovoltaic module 10 away from the second shielding layer 103, so that the edge of the photovoltaic module 10 can be shielded by the first shielding layer 102, the second shielding layer 103 and the adjacent photovoltaic module 10, so that the surface color difference of the photovoltaic module 10 can be smaller.

[0091] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure, so the protection scope of the embodiments of the present disclosure shall be based on the scope defined in the claims.

Claims

1. A photovoltaic module, characterized in that: include: A plurality of battery strings arranged along a first direction, wherein the battery strings include a plurality of battery cells arranged along a second direction; a bus bar extending along the first direction and electrically connected to the plurality of battery strings arranged along the first direction; a first shielding layer, the first shielding layer extending along the first direction and being located on the bus bar and facing the bus bar; a second shielding layer, wherein the second shielding layer is in a mesh shape, and the mesh-shaped second shielding layer includes first connecting lines extending along the first direction and second connecting lines extending along the second direction, the first connecting lines are directly opposite to the gaps between the battery cells arranged along the second direction, and the second connecting lines are directly opposite to the gaps between the battery cells arranged along the first direction; The surface of the first shielding layer and the surface of the second shielding layer are the same or similar in color to the surface of the battery cell.

2. The photovoltaic module according to claim 1, characterized in that: The bus bar comprises: a first bus bar, the first bus bar being located at one side of the battery string along the second direction, and the first bus bar being electrically connected to all the battery strings; A second bus bar, wherein the second bus bar is located at the other side of the battery string along the second direction, and the second bus bar is electrically connected to a portion of the battery string.

3. The photovoltaic module according to claim 2, characterized in that: The first shielding layer comprises: A first sub-shielding layer, wherein the first sub-shielding layer is located on a top surface of the first bus bar; The second sub-shielding layer is located on the top surface of the second bus bar, and in the second direction, the width of the first sub-shielding layer is greater than the width of the second sub-shielding layer.

4. The photovoltaic module according to claim 1, characterized in that: The battery string includes a front side and a back side opposite to each other along a third direction, the first shielding layer is located on the front side, and the second shielding layer is located on the back side.

5. The photovoltaic module according to claim 1 or 4, characterized in that: Along the second direction, the difference between the width of the first connecting line and the gap between adjacent battery cells is 5 to 8 mm, and along the first direction, the difference between the width of the second connecting line and the gap between adjacent battery cells is 5 to 8 mm.

6. The photovoltaic module according to claim 1, characterized in that: Also includes: A card connection space is located on a side of the first shielding layer away from the battery string, and the card connection space is used to connect different photovoltaic components.

7. The photovoltaic module according to claim 6, characterized in that: Along the first direction, the width of the clamping space is less than or equal to 60 mm.

8. The photovoltaic module according to claim 1, characterized in that: The color of the bus bar is the same as or similar to the surface color of the battery cell.

9. The photovoltaic module according to claim 1, characterized in that: The first shielding layer covers the surface of the bus bar.

10. A photovoltaic component, characterized in that: include: An installation hanger, the installation hanger is fixedly connected to the roof, and a limiting space is provided on the installation hanger; A plurality of photovoltaic modules as described in any one of claims 1 to 9 above, wherein adjacent photovoltaic modules are overlapped up and down, and the photovoltaic modules are snapped into the limiting space.

Images