Photovoltaic system and photovoltaic building surface

Abstract

The utility model discloses a photovoltaic system and a photovoltaic building surface. The photovoltaic system comprises a plurality of photovoltaic modules and connecting pieces. The photovoltaic assembly is used for converting light energy into electric energy. The connecting pieces are connected with the photovoltaic modules, and the connecting pieces are used for mechanically and electrically connecting two adjacent photovoltaic modules. According to the photovoltaic system provided by the embodiment of the invention, the connecting pieces are arranged on the photovoltaic modules, so that mechanical connection and electrical connection can be realized at the same time under the condition that the two photovoltaic modules are mutually lapped, and the connecting structure in the photovoltaic system is relatively simple.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and more specifically, to a photovoltaic system and a photovoltaic building surface. Background Art

[0002] In recent years, photovoltaic products have developed rapidly. Photovoltaic products are widely used on building surfaces. Photovoltaic products can take into account both aesthetics and power generation functions. Multiple photovoltaic modules can be overlapped to form a photovoltaic building surface installed on the roof. In order to ensure the stable connection of multiple photovoltaic modules, a mechanical connection structure needs to be set on the photovoltaic module. At the same time, wires need to be set between multiple photovoltaic modules to achieve electrical connection between photovoltaic modules. The mechanical connection and electrical connection of the photovoltaic system are two independent structures, and the connection structure of the photovoltaic system is relatively complex. Utility Model Content

[0003] The embodiments of the present application provide a photovoltaic system and a photovoltaic building surface, which are at least used to solve the problem that the mechanical connection and electrical connection of the photovoltaic system are two independent structures, and the connection structure between photovoltaic systems is relatively complex.

[0004] The photovoltaic system of the embodiment of the present application comprises a plurality of photovoltaic modules and a connector. The photovoltaic modules are used to convert light energy into electrical energy. The connector is connected to the photovoltaic modules, and the connector is used to mechanically and electrically connect two adjacent photovoltaic modules.

[0005] In some embodiments, the photovoltaic module includes a light-receiving surface and a backlight surface opposite to each other, the photovoltaic module includes a battery cell, the battery cell includes a positive electrode and a negative electrode, the connector includes a first connector and a second connector, the first connector is connected to the positive electrode and protrudes from the light-receiving surface, and the second connector is connected to the negative electrode and protrudes from the backlight surface.

[0006] In some embodiments, the photovoltaic module also includes a front panel, a first film layer, a second film layer and a back panel, and the front panel, the first film layer, the battery cell, the second film layer and the back panel are stacked in sequence; the first connector passes through the first film layer and the front panel, the first end of the first connector is connected to the positive electrode, and the second end of the first connector protrudes from the light-receiving surface; the second connector passes through the second film layer and the back panel, the first end of the second connector is connected to the negative electrode, and the second end of the second connector protrudes from the backlight surface.

[0007] In some embodiments, the photovoltaic module also includes a front panel, a first film layer, a second film layer and a back panel, and the front panel, the first film layer, the battery cell, the second film layer and the back panel are stacked in sequence; the first connecting member protrudes and extends from the front panel, and the positive electrode is connected to the first connecting member through a conductive member penetrating the first film layer and the front panel; the second connecting member protrudes and extends from the back panel, and the negative electrode is connected to the first connecting member through a conductive member penetrating the second film layer and the back panel.

[0008] In some embodiments, the photovoltaic module also includes a front panel, a first film layer, a second film layer and a back panel, and the front panel, the first film layer, the battery cell, the second film layer and the back panel are stacked in sequence; the first connecting member protrudes and extends from the front panel, and the positive electrode penetrates the first film layer and the front panel to be connected to the first connecting member; the second connecting member protrudes and extends from the back panel, and the negative electrode penetrates the second film layer and the back panel to be connected to the first connecting member.

[0009] In certain embodiments, when a plurality of the photovoltaic components are overlapped, a first connector of one photovoltaic component is connected to a second connector of another adjacent photovoltaic component.

[0010] In some embodiments, a protrusion is provided at one end of one of the first connector and the second connector away from the battery cell, and a groove is provided at the other end of the first connector and the second connector away from the battery cell, and the protrusion cooperates with the groove.

[0011] In some embodiments, the diameter of the connecting member ranges from [2 mm, 8 mm].

[0012] In certain embodiments, the material of the connecting member is zinc-magnesium alloy, magnesium-aluminum alloy or nickel-plated alloy.

[0013] In some embodiments, the photovoltaic system further includes a filling piece. When two adjacent photovoltaic components are connected via the connecting piece, the filling piece is arranged around the connecting piece. In the thickness direction of the photovoltaic system, the filling piece is located between two adjacent photovoltaic components. The material of the filling layer is triple glue, butyl rubber or silicone rubber.

[0014] In some embodiments, the bending radius of the photovoltaic module ranges from [25 mm, 200 mm].

[0015] The photovoltaic building surface of the embodiment of the present application includes the photovoltaic system described in any of the above embodiments.

[0016] In the photovoltaic system and photovoltaic building surface of the implementation mode of the present application, by arranging connectors on the photovoltaic components, mechanical connection and electrical connection can be achieved simultaneously when two photovoltaic components are overlapped with each other, and the connection structure in the photovoltaic system is relatively simple.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a three-dimensional schematic diagram of a photovoltaic system according to certain embodiments of the present application;

[0020] Figure 2 yes Figure 1 A three-dimensional exploded schematic diagram of a photovoltaic system;

[0021] Figure 3 is a schematic diagram of a structure in which two photovoltaic modules are connected via a connector in certain embodiments of the present application;

[0022] Figure 4 is a schematic diagram of the structure of a connector of certain embodiments of the present application;

[0023] Figure 5 It is a schematic diagram of the structure of a photovoltaic building surface in certain embodiments of the present application.

[0024] Description of main component symbols:

[0025] 1000, photovoltaic building surface; 100, photovoltaic system; 10, photovoltaic module; 11, front plate; 12, first adhesive film layer; 13, battery cell; 131, positive electrode; 133, negative electrode; 14, second adhesive film layer; 15, back plate; 16, through hole; 17, light-receiving surface; 19, backlight surface; 30, connector; 31, first connector; 311, first end of the first connector; 313, second end of the first connector; 315, groove; 33, second connector; 331, first end of the second connector; 333, second end of the second connector; 335, protrusion; 50, conductive member; 70, filling member. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] In recent years, photovoltaic products have developed rapidly. Photovoltaic products are widely used on building surfaces. Photovoltaic products can take into account both aesthetics and power generation functions. Multiple photovoltaic modules can be overlapped to form a photovoltaic building surface installed on the roof. In order to firmly connect multiple photovoltaic modules, it is necessary to set a mechanical connection structure on the photovoltaic module. At the same time, wires need to be set between multiple photovoltaic modules to achieve electrical connection between photovoltaic modules. The mechanical connection and electrical connection of the photovoltaic system are two independent structures, and the connection structure of the photovoltaic system is relatively complex. In order to solve this problem, the embodiment of the present application provides a photovoltaic system 100 ( Figure 1 As shown) and photovoltaic building surface 1000 ( Figure 5 shown).

[0033] See also Figures 1 to 3 The photovoltaic system 100 of the embodiment of the present application includes a plurality of photovoltaic modules 10 and a connector 30. The photovoltaic modules 10 are used to convert light energy into electrical energy. The connector 30 is connected to the photovoltaic modules 10, and the connector 30 is used to mechanically and electrically connect two adjacent photovoltaic modules 10.

[0034] Specifically, the photovoltaic module 10 is a structure for converting light energy into electrical energy to power other components, and can be used as a component of a building. For example, the photovoltaic module 10 can power household appliances, energy storage power supplies, or street lamps. The photovoltaic module 10 can be, but is not limited to, a flat photovoltaic component or a curved photovoltaic component. The present application takes the photovoltaic module 10 as a curved photovoltaic component as an example. The curved photovoltaic component can be installed on the top or side of a building. The curved photovoltaic component can generate electricity while taking into account the aesthetics of the building.

[0035] See also Figures 1 to 3 The connector 30 is used to connect multiple photovoltaic modules 10 to each other, thereby forming a stable photovoltaic system 100. Figure 5In one embodiment, the connection member 30 mechanically connects two adjacent photovoltaic modules 10, which means that the two photovoltaic modules 10 will not move relative to each other in the first direction X and the second direction Y. Generally, a plurality of photovoltaic modules 10 are overlapped on the roof at an angle. After the two adjacent photovoltaic modules 10 are connected by the connection member 30, the relative movement of the two adjacent photovoltaic modules 10 in the first direction X and the second direction Y is limited, so that the structure of the photovoltaic system 100 is relatively stable, the power generation capacity of the photovoltaic system 100 is relatively stable, and the safety performance of the photovoltaic system 100 is relatively high. And when the two adjacent photovoltaic modules 10 do not move relative to each other in the first direction X and the second direction Y, a large gap will not be formed between the adjacent photovoltaic modules 10, so that the waterproof performance of the photovoltaic system 100 is better. In another embodiment, the connection member 30 mechanically connects two adjacent photovoltaic modules 10, which means that the two photovoltaic modules 10 will not move relative to each other in the first direction X, the second direction Y and the third direction Z. At this time, the connection between the plurality of photovoltaic modules 10 is more stable, and the safety performance of the photovoltaic system 100 is higher. The photovoltaic system 100 can be transported and installed as a whole. For example, the photovoltaic system 100 can be installed as a whole on a roof or removed from a roof. The installation and transportation of the photovoltaic system 100 are relatively convenient.

[0036] See also Figures 1 to 3 The connector 30 is also used to electrically connect two adjacent photovoltaic modules 10, so that the connector 30 can integrate the functions of mechanical connection and electrical connection, and the structure of mechanical connection and electrical connection in the photovoltaic system 100 is relatively simple. Preferably, the connector 30 is made of a metal conductive material, and the connector 30 is electrically connected to the battery cell 13 in the photovoltaic module 10. The electrical connection between the photovoltaic modules 10 can be achieved by the connectors 30 on two adjacent photovoltaic modules 10 contacting each other, avoiding the need for additional wires to electrically connect the adjacent photovoltaic modules 10, and the electrical connection method between the photovoltaic modules 10 is relatively simple. At the same time, it can also save the material of the wire, thereby reducing the material cost of the photovoltaic system 100.

[0037] In one embodiment, the connector 30 can connect two adjacent photovoltaic modules 10 in series, so that multiple photovoltaic modules 10 in the photovoltaic system 100 are connected in series, and the voltage output by the photovoltaic system 100 is relatively high. In another embodiment, the connector 30 can connect two adjacent photovoltaic modules 10 in parallel, and the current output by the photovoltaic system 100 is relatively high. This application is described by taking the example of connecting two adjacent photovoltaic modules 10 in series by the connector 30.

[0038] At least two connectors 30 are provided on each photovoltaic module 10. When two connectors 30 are provided on a photovoltaic module 10, one connector 30 is used to lead out the positive electrode 131 of the photovoltaic module 10, and the other connector 30 is used to lead out the negative electrode 133 of the photovoltaic module 10. The positive electrode 131 of the photovoltaic module 10 is connected to the negative electrode 133 of an adjacent photovoltaic module 10, and the negative electrode 133 of the photovoltaic module 10 is connected to the positive electrode 131 of another adjacent photovoltaic module 10. The number of connectors 30 provided on a photovoltaic module 10 can also be three, four, five or more. When the number of connectors 30 provided on a photovoltaic module 10 is multiple, the connection strength of the connectors 30 is high, and the connection between adjacent photovoltaic modules 10 is more stable.

[0039] The connector 30 is detachably or non-detachably mounted on the photovoltaic module 10, wherein the detachable mounting method includes but is not limited to threaded connection or snap-on connection, etc. The non-detachable mounting method includes but is not limited to gluing connection or interference fit, etc.

[0040] The photovoltaic system 100 of the embodiment of the present application can achieve mechanical connection and electrical connection at the same time when two photovoltaic modules 10 are overlapped by providing a connector 30 on the photovoltaic module 10. The connection structure in the photovoltaic system 100 is relatively simple.

[0041] The photovoltaic system 100 is further described below with reference to the accompanying drawings.

[0042] See also Figure 2 and Figure 3 In some embodiments, the photovoltaic module 10 includes a light-receiving surface 17 and a backlight surface 19 opposite to each other, the photovoltaic module 10 includes a battery cell 13, the battery cell 13 includes a positive electrode 131 and a negative electrode 133, the connector 30 includes a first connector 31 and a second connector 33, the first connector 31 is connected to the positive electrode 131 and protrudes from the light-receiving surface 17, and the second connector 33 is connected to the negative electrode 133 and protrudes from the backlight surface 19.

[0043] Among them, the battery cell 13 is a structure for receiving light energy entering from the light-receiving surface 17 and converting the light energy into electrical energy. The positive electrode 131 and the negative electrode 133 of the battery cell 13 of the present application are both arranged on the side of the battery cell 13 close to the backlight surface 19, so that the interconnection belt and the busbar connecting the positive electrode 131 and the negative electrode 133 are both located on the side of the battery cell 13 close to the backlight surface 19. The area of ​​the side of the battery cell 13 close to the light-receiving surface 17 that contacts the light is larger, so that the utilization rate of the light by the battery cell 13 is higher, and the power generation efficiency of the photovoltaic module 10 is higher. In addition, there is no shielding of the interconnection belt and the busbar on the side of the battery cell 13 close to the light-receiving surface 17, and the aesthetics of the battery cell 13 and the photovoltaic module 10 are better.

[0044] A busbar is welded on the cell 13, the positive electrode 131 of the cell 13 refers to the positive electrode 131 led out through the busbar, and the negative electrode 133 of the cell 13 refers to the negative electrode 133 led out through the busbar. The first connector 31 is connected to the busbar, so that the positive electrode 131 of the cell 13 is led out of the photovoltaic module 10, so that the photovoltaic module 10 is electrically connected to the negative electrode 133 of another photovoltaic module 10. The second connector 33 is connected to the busbar, so that the negative electrode 133 of the cell 13 is led out of the photovoltaic module 10, so that the photovoltaic module 10 is electrically connected to the positive electrode 131 of another photovoltaic module 10.

[0045] The number of the first connector 31 may be, but is not limited to, one, two, three or more. In the case where there is one first connector 31, the first connector 31 may be installed at any position of the photovoltaic assembly 10 and protrude from the light-receiving surface 17. At this time, the first connector 31 uses less material, which can save material, and the installation between the first connector 31 and the photovoltaic assembly 10 is relatively simple. In the case where there are multiple first connectors 31, the multiple first connectors 31 may be evenly or unevenly distributed on the photovoltaic assembly 10. Preferably, the multiple first connectors 31 are evenly distributed on the photovoltaic assembly 10, so that when two adjacent photovoltaic assemblies 10 are connected, the force distribution on the photovoltaic assembly 10 is relatively uniform, and the photovoltaic assembly 10 can avoid the problem of fragmentation due to uneven surface force. At this time, the connection between the two adjacent photovoltaic assemblies 10 is more stable, and the electrical connection between the two adjacent photovoltaic assemblies 10 is also relatively stable. The number of first connectors 31 provided on each photovoltaic assembly 10 may be the same or different. Preferably, the number of first connecting members 31 provided on each photovoltaic assembly 10 is the same, so that the processing of the photovoltaic system 100 is more convenient.

[0046] The number of the second connectors 33 may be the same as the number of the first connectors 31. When there is one first connector 31, there is also one second connector 33. At this time, the second connector 33 uses less material, which can save material, and the installation between the second connector 33 and the photovoltaic module 10 is relatively simple. When there are multiple first connectors 31, there are also multiple second connectors 33. For example, when there are two first connectors 31, there are also two second connectors 33. When there are three first connectors 31, there are also three second connectors 33. At this time, the connection between the two adjacent photovoltaic modules 10 is more stable, and the electrical connection between the two adjacent photovoltaic modules 10 is also relatively stable.

[0047] See also Figure 2Furthermore, in some embodiments, the photovoltaic module 10 also includes a front panel 11, a first film layer 12, a second film layer 14 and a back panel 15, and the front panel 11, the first film layer 12, the battery cell 13, the second film layer 14 and the back panel 15 are stacked in sequence.

[0048] Specifically, the front plate 11 is a curved hard structure for protecting the side of the battery cell 13 close to the light receiving surface 17. The front plate 11 can be transparent tempered glass or transparent ultra-white tempered glass, etc., and the front plate 11 can also be made of transparent polymer materials such as polycarbonate. Preferably, the light transmittance of the front plate 11 is high, for example, the light transmittance can be greater than or equal to 70%, so that most or even all of the light can pass through the front plate 11 to reach the battery cell 13, so that the battery cell 13 can convert the received light energy into electrical energy. For example, the light transmittance of the front plate 11 can be 70%, 73.1%, 75.6%, 77%, 78.5%, 80.3%, 83%, 85.1%, 87.2%, 90.5%, 92.4%, 93.7%, 95.6%, 97.8%, or 100%, etc.

[0049] The back plate 15 is a structure for protecting the side of the battery cell 13 close to the backlight surface 19. The battery cell 13 is arranged between the front plate 11 and the back plate 15, and the battery cell 13 is protected by the front plate 11 and the back plate 15. The back plate 15 has certain waterproof and insulating properties. In one embodiment, the back plate 15 is a curved hard plate that is the same as the front plate 11. The material of the back plate 15 can be, but is not limited to, tempered glass or ultra-white tempered glass. In the case where the material of the back plate 15 is a curved hard plate, the strength of the back plate 15 is relatively high, and it can provide better protection for the battery cell 13. And the back plate 15 can fit tightly with the battery cell 13 and the front plate 11, thereby forming a curved photovoltaic component. In another embodiment, the back plate 15 is a flexible back plate 15, and the material of the back plate 15 can be polyethylene terephthalate (PET) or a composite material of PET. When the back sheet 15 is a flexible back sheet 15, the weight of the back sheet 15 is relatively light, so that the weight of the photovoltaic module 10 as a whole is relatively light, and the photovoltaic module 10 is easy to transport and carry. In addition, the back sheet 15 has good bending performance. When the back sheet 15 needs to be attached to both the battery cell 13 and the front sheet 11, the back sheet 15 can be bent to form a curved structure similar to the front sheet 11.

[0050] The first adhesive film layer 12 is used to bond the front plate 11 and the battery cell 13 so that the front plate 11 and the battery cell 13 are tightly connected. The second adhesive film layer 14 is used to bond the battery cell 13 and the back plate 15 so that the battery cell 13 and the back plate 15 are tightly connected. The material of the first adhesive film layer 12 can be ethylene vinyl acetate (EVA), polyolefin (POE), polyvinyl butyral (PVB), or thermoplastic elastomer (TPO). At this time, the light transmittance of the first adhesive film layer 12 is relatively high. In the process of light passing through the first adhesive film layer 12 to reach the battery cell 13, the light loss through the first adhesive film layer 12 is relatively small, so that the battery cell 13 has a higher utilization rate of light. For example, the light transmittance of the first adhesive film layer 12 may be greater than or equal to 70%, and the light transmittance of the first adhesive film layer 12 may be 70%, 75.2%, 79.5%, 82.1%, 86.3%, 88.2%, 93.1%, 94.2%, 98.5%, or 100%. The material of the second adhesive film layer 14 may be EVA, POE, PVB, or TPO. The material of the second adhesive film layer 14 may be the same as or different from the material of the first adhesive film layer 12. The second adhesive film layer 14 may be a light-transmitting adhesive film, or the second adhesive film layer 14 may be a cut-off adhesive film.

[0051] See also Figure 2 In some embodiments, the first connector 31 passes through the first adhesive film layer 12 and the front plate 11, the first end 311 of the first connector 31 is connected to the positive electrode 131, the second end 313 of the first connector 31 protrudes from the light receiving surface 17, the second connector 33 passes through the second adhesive film layer 14 and the back plate 15, the first end 331 of the second connector 33 is connected to the negative electrode 133, and the second end 333 of the second connector 33 protrudes from the backlight surface 19.

[0052] Among them, the front plate 11 may be provided with a through hole 16, and the through hole 16 provided in the front plate 11 is used for the first connector 31 to be installed therein. The opening shape of the through hole 16 may be the same as the cross-sectional shape of the first connector 31, so that the first connector 31 can be firmly installed on the front plate 11. The cross-sectional shape of the first connector 31 may be, but is not limited to, circular, elliptical, triangular, quadrilateral or other polygonal shapes. The cross-sectional shape of the first connector 31 of the present application is circular, so the opening shape of the through hole 16 is also circular. The back plate 15 may also be provided with a through hole 16, and the through hole 16 provided in the back plate 15 is used for the second connector 33 to be installed therein. The cross-sectional shape of the first connector 31 of the present application is circular, and the cross-sectional shape of the second connector 33 is also circular, so the opening shape of the through hole 16 is also circular.

[0053] In other embodiments, in the thickness direction of the photovoltaic module 10, the through hole 16 in which the first connector 31 is installed can penetrate the photovoltaic module 10, that is, the through hole 16 can penetrate the front plate 11, the first adhesive film layer 12, the battery cell 13, the second adhesive film layer 14 and the back plate 15. In the thickness direction of the photovoltaic module 10, the through hole 16 in which the second connector 33 is installed can also penetrate the photovoltaic module 10.

[0054] The first end 311 of the first connector 31 extends into the vicinity of the cell 13 and is connected to the busbar, so that the first end 311 of the first connector 31 is connected to the positive electrode 131. The second end 313 of the first connector 31 protrudes from the light-receiving surface 17 to be connected to the second connector 33 of another photovoltaic module 10. The first end 331 of the second connector 33 extends into the vicinity of the cell 13 and is connected to the busbar, so that the first end 331 of the second connector 33 is connected to the negative electrode 133. The second end 333 of the second connector 33 protrudes from the backlight surface 19 to be connected to the first connector 31 of another photovoltaic module 10.

[0055] See also Figure 2 In other embodiments, the first connector 31 protrudes and extends from the front plate 11, and the positive electrode 131 is connected to the first connector 31 through the conductive member 50 that penetrates the first adhesive film layer 12 and the front plate 11; the second connector 33 protrudes and extends from the back plate 15, and the negative electrode 133 is connected to the first connector 31 through the conductive member 50 that penetrates the second adhesive film layer 14 and the back plate 15. Among them, the conductive member 50 is used to connect the busbar and the first end 311 of the first connector 31, so that the first connector 31 is electrically connected to the positive electrode 131. The conductive member 50 is also used to connect the busbar and the first end 331 of the second connector 33, so that the second connector 33 is electrically connected to the negative electrode 133. The conductive member 50 can be, but is not limited to, a braided copper strip or a tinned copper strip. At this time, the conductive member 50 has good conductivity and good anti-oxidation performance.

[0056] Please continue reading Figure 2 In some other embodiments, the first connector 31 protrudes and extends from the front plate 11, and the positive electrode 131 penetrates the first film layer 12 and the front plate 11 to connect with the first connector 31; the second connector 33 protrudes and extends from the back plate 15, and the negative electrode 133 penetrates the second film layer 14 and the back plate 15 to connect with the first connector 31. Among them, the busbar on the battery cell 13 penetrates the first film layer 12 and the front plate 11, and is connected to the first end 311 of the first connector 31, so that the first connector 31 is electrically connected to the positive electrode 131. The busbar on the battery cell 13 penetrates the second film layer 14 and the back plate 15, and is connected to the first end 331 of the second connector 33, so that the second connector 33 is electrically connected to the negative electrode 133.

[0057] See also Figure 3 and Figure 5 In some embodiments, when multiple photovoltaic modules 10 are overlapped, the first connector 31 of one photovoltaic module 10 is connected to the second connector 33 of another adjacent photovoltaic module 10, so that the two photovoltaic modules 10 are firmly connected. And the positive electrode 131 of one photovoltaic module 10 is connected to the negative electrode 133 of another photovoltaic module 10, so that a series circuit is formed between the multiple photovoltaic modules 10. When multiple photovoltaic modules 10 are overlapped, the mechanical connection and electrical connection between the adjacent photovoltaic modules 10 can be achieved at the same time, and the connection method of the mechanical connection and electrical connection between the multiple photovoltaic modules 10 is relatively simple.

[0058] Since the photovoltaic system 100 is generally installed at an angle on the roof, when multiple photovoltaic modules 10 are overlapped, in the thickness direction of the photovoltaic modules 10, when the upper photovoltaic module 10 overlaps with the lower photovoltaic module 10, the edge of the upper photovoltaic module 10 is above the light-receiving surface 17 of the lower photovoltaic module 10. Rainwater will flow down the inclined photovoltaic system 100, and will not penetrate from the overlap gap between the upper photovoltaic module 10 and the lower photovoltaic module 10 to cause water leakage.

[0059] See also Figure 4 In some embodiments, a protrusion 335 is provided at one end of one of the first connector 31 and the second connector 33 away from the battery cell 13, and a groove 315 is provided at the other end of the first connector 31 and the second connector 33 away from the battery cell 13, and the protrusion 335 cooperates with the groove 315.

[0060] Specifically, in one embodiment, a protrusion 335 is provided at one end of the first connector 31 away from the battery cell 13, that is, a protrusion 335 is provided at the second end 313 of the first connector 31. A groove 315 is provided at one end of the second connector 33 away from the battery cell 13, that is, a groove 315 is provided at the second end 333 of the second connector 33. The protrusion 335 cooperates with the groove 315 to connect two adjacent photovoltaic modules 10. As can be seen from the above, the cross-sectional shapes of the first connector 31 and the second connector 33 of the present application are both circular, then the body of the first connector 31 is a cylindrical structure, and the body of the second connector 33 is a cylindrical structure. The protrusion 335 is a structure extending from the body (cylinder) of the first connector 31 toward the end away from the battery cell 13. The protrusion 335 can be, but is not limited to, a cylinder, a hemisphere, or a cone. The groove 315 is formed by being recessed from the end of the body (cylinder) of the second connector 33 away from the battery cell 13 toward the end close to the battery cell 13. The shape of the groove 315 corresponds to the shape of the protrusion 335, so that when the first connecting member 31 and the second connecting member 33 are matched, the connection between the first connecting member 31 and the second connecting member 33 is relatively stable. When the protrusion 335 is a cylinder, the groove 315 is a cylindrical concave structure. When the protrusion 335 is a hemispherical body, the groove 315 is a hemispherical concave structure. When the protrusion 335 is a cone, the groove 315 is a conical concave structure.

[0061] In another embodiment, a groove 315 is provided at one end of the first connector 31 away from the cell 13, that is, a groove 315 is provided at the second end 313 of the first connector 31. A protrusion 335 is provided at one end of the second connector 33 away from the cell 13, that is, a protrusion 335 is provided at the second end 333 of the second connector 33. The protrusion 335 cooperates with the groove 315 to connect two adjacent photovoltaic modules 10.

[0062] The second end 313 of the first connector 31 of the present application is provided with a groove 315, and the groove 315 is a hemispherical concave structure. The second end 333 of the second connector 33 is provided with a protrusion 335, and the protrusion 335 is a hemispherical structure. In one example, when the first connector 31 and the second connector 33 are connected, the protrusion 335 extends into the groove 315 so that two adjacent photovoltaic components 10 are firmly connected. In another example, when the first connector 31 and the second connector 33 are connected, the second connector 33 is fully extended into the first connector 31 (the cylindrical structure of the second connector 33 cooperates with the cylindrical structure of the first connector 31, and the protrusion 335 cooperates with the groove 315). At this time, the connection between the first connector 31 and the second connector 33 is more stable, so that the connection between the two adjacent photovoltaic components 10 is more stable.

[0063] See also Figures 2 to 4In some embodiments, the diameter of the connecting member 30 is in the range of [2 mm, 8 mm]. Specifically, the diameter of the first connecting member 31 is in the range of [2 mm, 8 mm], and the diameter of the second connecting member 33 is also in the range of [2 mm, 8 mm]. When the first connecting member 31 cooperates with the second connecting member 33, the second connecting member 33 extends into the first connecting member 31, so that the diameter of the second connecting member 33 is smaller than the diameter of the first connecting member 31.

[0064] When the diameter of the first connector 31 is less than 2 mm, the connection strength of the first connector 31 is low. When adjacent photovoltaic modules 10 are connected, there is a risk of unstable connection between the photovoltaic modules 10. When the diameter of the first connector 31 is greater than 8 mm, the overall volume of the first connector 31 is too large, and the overall aesthetics of the photovoltaic system 100 is poor. When the diameter of the first connector 31 is in the range of [2 mm, 8 mm], the connection strength of the first connector 31 is high, the connection between adjacent photovoltaic modules 10 is relatively stable, and the overall aesthetics of the photovoltaic system 100 is also good.

[0065] When the diameter of the second connector 33 is less than 2 mm, the connection strength of the second connector 33 is low, and when adjacent photovoltaic modules 10 are connected, there is a risk of unstable connection between the photovoltaic modules 10. When the diameter of the second connector 33 is greater than 8 mm, the overall volume of the second connector 33 is too large, and the overall aesthetics of the photovoltaic system 100 is poor. When the diameter of the second connector 33 is in the range of [2 mm, 8 mm], the strength of the second connector 33 is high, the connection between adjacent photovoltaic modules 10 is relatively stable, and the overall aesthetics of the photovoltaic system 100 is also good.

[0066] See also Figure 4 In some embodiments, the material of the connector 30 is zinc-magnesium alloy, magnesium-aluminum alloy or nickel-plated alloy. At this time, the electrical conductivity of the connector 30 is good, so that the electrical connection between the multiple photovoltaic modules 10 is relatively stable. And the connection strength of the connector 30 is high, and the connection between the multiple photovoltaic modules 10 is relatively stable. In addition, when the material of the connector 30 is zinc-magnesium alloy, magnesium-aluminum alloy or nickel-plated alloy, the antioxidant performance of the connector 30 is also good. When the connector 30 is used, the connector 30 will not have the problem of reduced conductivity due to oxidation. And the connector 30 will not corrode due to oxidation, and the service life of the connector 30 is long. The connector 30 can also be made of other metal materials with good electrical conductivity and antioxidant properties.

[0067] See also Figure 3Furthermore, in some embodiments, the photovoltaic system 100 also includes a filling piece 70. When two adjacent photovoltaic components 10 are connected by a connecting piece 30, the filling piece 70 is arranged around the connecting piece 30. In the thickness direction of the photovoltaic system 100, the filling piece 70 is located between the two adjacent photovoltaic components 10, and the material of the filling layer is triple glue, butyl glue or silicone.

[0068] Among them, when the first connector 31 and the second connector 33 are connected, the filler 70 is wrapped around the surface of the first connector 31 and the second connector 33 in all directions. When the material of the filler 70 is three-force glue, butyl glue or silicone, the waterproof function of the filler 70 is better. The filler 70 can be used to prevent water vapor or dust from contacting the connector 30 to ensure the stability of the performance of the connector 30 and avoid problems such as short circuit or corrosion of the connector 30. And at this time, the filler 70 has a certain elasticity. The filler 70 can also be used as a buffer between two adjacent photovoltaic components 10 to avoid the problem that the two photovoltaic components 10 are rigidly in contact when connected, thereby causing the photovoltaic components 10 to break. In other embodiments, the filler 70 can also be made of other materials with waterproof performance and elasticity.

[0069] See also Figure 1 , Figure 2 and Figure 5 In some embodiments, the bending radius of the photovoltaic component 10 has a value range of [25mm, 200mm]. Wherein, in the case where the photovoltaic component 10 is a curved photovoltaic component, the longitudinal projection of the photovoltaic component 10 is a curve composed of one or more curved segments. For example, the number of curved segments may be 1 segment, 3 segments, 6 segments, 7 segments, or 10 segments, etc. In the case where the curved segment is 1 segment, the shape of the photovoltaic component 10 is an arc-shaped curved surface with a single crest. In the case where the curved segment is multiple segments, the shape of the photovoltaic component 10 is a wavy curved surface with multiple crests. The bending radius of the photovoltaic component 10 refers to the bending radius of each curved segment (the bending radius of each curved segment in the photovoltaic component 10 of the present application is the same). In the photovoltaic component 10, the bending radius of the front panel 11, the bending radius of the battery cell 13, and the bending radius of the back panel 15 are all the same.

[0070] Specifically, the bending radius of the photovoltaic module 10 can be 25mm, 38.6mm, 43.7mm, 50mm, 63.4mm, 70.8mm, 81.3mm, 98.7mm, 101mm, 109.2mm, 112.5mm, 120.9mm, 136.7mm, 162.1mm or 200mm, etc. When the bending radius of the photovoltaic module 10 is less than 25mm, the deformation of the battery cell 13 in the photovoltaic module 10 is too large, and the battery cell 13 is prone to the risk of breaking. When the bending radius of the photovoltaic module 10 is greater than 200mm, the curvature of the photovoltaic module 10 is not obvious enough, and the aesthetics is not good enough. When the value range of the bending radius of the photovoltaic module 10 is [25mm, 200mm], the curvature of the photovoltaic module 10 is more obvious, and the aesthetics is better. At the same time, the deformation of the battery cell 13 is within the tolerable range, and the battery cell 13 is not easy to break.

[0071] See also Figure 5 The photovoltaic building surface 1000 of the embodiment of the present application includes the photovoltaic system 100 of any of the above embodiments.

[0072] The photovoltaic building surface 1000 of the embodiment of the present application can achieve mechanical connection and electrical connection at the same time when two photovoltaic modules 10 are overlapped with each other by setting connectors 30 on the photovoltaic modules 10, and the connection structure in the photovoltaic system 100 is relatively simple.

[0073] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0074] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A photovoltaic system, characterized in that: include: A plurality of photovoltaic modules for converting light energy into electrical energy; and A connector is connected to the photovoltaic assembly and is used to mechanically and electrically connect two adjacent photovoltaic assemblies.

2. The photovoltaic system according to claim 1, characterized in that: The photovoltaic module includes a light-receiving surface and a backlight surface opposite to each other, the photovoltaic module includes a battery cell, the battery cell includes a positive electrode and a negative electrode, the connecting member includes a first connecting member and a second connecting member, the first connecting member is connected to the positive electrode and protrudes from the light-receiving surface, and the second connecting member is connected to the negative electrode and protrudes from the backlight surface.

3. The photovoltaic system according to claim 2, characterized in that: The photovoltaic module further includes a front plate, a first adhesive film layer, a second adhesive film layer and a back plate, wherein the front plate, the first adhesive film layer, the battery cell, the second adhesive film layer and the back plate are stacked in sequence; The first connecting member passes through the first adhesive film layer and the front plate, the first end of the first connecting member is connected to the positive electrode, and the second end of the first connecting member protrudes from the light-receiving surface, the second connecting member passes through the second adhesive film layer and the back plate, the first end of the second connecting member is connected to the negative electrode, and the second end of the second connecting member protrudes from the backlight surface; or The first connecting member protrudes and extends from the front plate, and the positive electrode is connected to the first connecting member through a conductive member penetrating the first adhesive film layer and the front plate; the second connecting member protrudes and extends from the back plate, and the negative electrode is connected to the first connecting member through a conductive member penetrating the second adhesive film layer and the back plate; or The first connecting member protrudes and extends from the front plate, and the positive electrode penetrates the first film layer and the front plate to be connected to the first connecting member; the second connecting member protrudes and extends from the back plate, and the negative electrode penetrates the second film layer and the back plate to be connected to the first connecting member.

4. The photovoltaic system according to claim 2, characterized in that: In the case where a plurality of the photovoltaic components are overlapped, the first connecting member of one photovoltaic component is connected to the second connecting member of another adjacent photovoltaic component.

5. The photovoltaic system according to claim 2, characterized in that: One of the first connector and the second connector has a protrusion at one end away from the battery cell, and the other of the first connector and the second connector has a groove at one end away from the battery cell, and the protrusion matches the groove.

6. The photovoltaic system according to claim 1, characterized in that: The diameter of the connecting piece ranges from [2mm, 8mm].

7. The photovoltaic system according to claim 1, characterized in that: The material of the connecting piece is zinc-magnesium alloy, magnesium-aluminum alloy or nickel-plated alloy.

8. The photovoltaic system according to claim 1, characterized in that: The photovoltaic system also includes a filling piece. When two adjacent photovoltaic components are connected by the connecting piece, the filling piece is arranged around the connecting piece. In the thickness direction of the photovoltaic system, the filling piece is located between the two adjacent photovoltaic components. The material of the filling layer is triple glue, butyl rubber or silicone rubber.

9. The photovoltaic system according to claim 1, characterized in that: The bending radius of the photovoltaic module ranges from [25 mm to 200 mm].

10. A photovoltaic building surface, characterized in that: A photovoltaic system comprising any one of claims 1 to 9.

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