BIPV photovoltaic assembly and photovoltaic curtain wall

Abstract

The invention relates to the technical field of solar photovoltaics, and provides a BIPV photovoltaic module and a photovoltaic curtain wall, and the BIPV photovoltaic module comprises a laminated part, and positive and negative electrode outgoing lines are led out from the side surface of any edge of the laminated part; the positive and negative electrode connector is provided with a cable; the frame is arranged on the peripheral side of the laminated part, and a mounting groove is formed in the frame; and the positive and negative electrode outgoing lines and the cable are correspondingly connected in the mounting grooves. According to the BIPV photovoltaic module and the photovoltaic curtain wall, no junction box is located on the front face or the back face of the module, positive and negative electrode outgoing lines are led out from the side face of the module, on one hand, the problem that the product strength is reduced due to glass opening is solved, on the other hand, module installation and integration are facilitated, and the BIPV photovoltaic module and the photovoltaic curtain wall can serve as a part of a BIPV building and are integrally installed on the curtain wall and a roof; and the beauty of the assembly can be improved.

Description

Technical Field

[0001] The present invention relates to the field of solar photovoltaic technology, and in particular to a BIPV photovoltaic module and a photovoltaic curtain wall. Background Art

[0002] BIPV stands for "Building Integrated Photovoltaic", which means building photovoltaic integration. It can integrate photovoltaic modules with buildings as a substitute for roofs, skylights, building facades, etc. BIPV can not only meet the functional requirements of photovoltaic power generation, but also take into account the functional requirements of buildings.

[0003] In the prior art, there are two types of BIPV junction boxes, one is side-connected and the other is back-connected. However, the back-connected junction box will affect the aesthetics of the component integration in the building, and the strength will also decrease due to the glass opening. The side-connected junction box cannot be installed due to the narrow side of the component, and if a pen-type junction box is used, there is a risk of overheating. Summary of the invention

[0004] The present invention provides a BIPV photovoltaic module and a photovoltaic curtain wall, which are used to solve the defect in the prior art that the product strength is reduced due to the need to punch holes in the glass due to the presence of a junction box, and to improve the safe use performance of the BIPV photovoltaic module.

[0005] The present invention provides a BIPV photovoltaic module, comprising: The laminate has positive and negative electrode lead wires extending from the side of any edge; A positive and negative electrode connector having a cable; A frame is arranged on the outer peripheral side of the laminate, and a mounting groove is provided on the frame; and the positive and negative electrode lead wires and the cables are correspondingly connected in the mounting groove.

[0006] According to a BIPV photovoltaic module provided by the present invention, the position of the mounting groove corresponds to the position of the positive and negative electrode lead-out wires, and a through hole is provided at the position of the positive and negative electrode connector cables corresponding to the side of the frame, and the positive and negative electrode connector cables pass through the through hole.

[0007] According to a BIPV photovoltaic module provided by the present invention, the mounting groove is arranged on the side, front or back of the frame.

[0008] A BIPV photovoltaic assembly provided according to the present invention also includes: A conductive metal welding sheet is disposed in the mounting groove, and the conductive metal welding sheet is used to weld and connect the positive and negative electrode lead wires to the cable.

[0009] According to a BIPV photovoltaic module provided by the present invention, the laminate comprises a front layer, a back layer and a battery pack, the battery pack is located between the front layer and the back layer, and the front layer and the back layer are both provided with a packaging film on the side facing away from the battery pack. According to a BIPV photovoltaic module provided by the present invention, at least one of the front layer and the back layer is glass.

[0010] According to a BIPV photovoltaic module provided by the present invention, the installation groove is sealed with insulating sealant.

[0011] According to a BIPV photovoltaic module provided by the present invention, a bus bar is arranged inside the laminate, the bus bar is connected to the positive and negative electrode lead wires, and an anti-reverse diode string is also arranged between the bus bar and the positive and negative electrode lead wires.

[0012] According to a BIPV photovoltaic module provided by the present invention, the bus bar and the positive and negative electrode lead wires are both located at the edge of the glass; and the frame is a plastic frame.

[0013] The present invention also provides a photovoltaic curtain wall, comprising the BIPV photovoltaic module as described above.

[0014] The BIPV photovoltaic module provided by the present invention leads out the positive and negative electrode lead wires through any edge side of the laminate, the positive and negative electrode connectors have cables, and a frame is arranged on the outer peripheral side of the laminate. The frame is provided with an installation groove, and the positive and negative electrode lead wires and the cables are correspondingly connected in the installation groove. There is no junction box located on the front or back of the module, and the positive and negative electrode lead wires are led out from the side of the module. On the one hand, it solves the problem of reduced product strength caused by glass openings, and on the other hand, it is easy to install and integrate the module. It can be used as a part of the BIPV building and integrated with the curtain wall and roof, which helps to improve the appearance of the module.

[0015] The photovoltaic curtain wall provided by the present invention, because it includes the BIPV photovoltaic components as described above, has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a cross-sectional view of the BIPV photovoltaic module provided by the present invention.

[0018] Figure 2The present invention provides Figure 1 Schematic diagram of the enlarged structure of part A in FIG.

[0019] Reference numerals: 1. Laminate; 2. Positive and negative electrode lead wires; 3. Positive and negative electrode connectors; 4. Frame; 5. Bus bar; 6. Anti-reverse diode string; 7. Insulation sealant. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] Combine the following Figure 1-Figure 2 The BIPV photovoltaic module of the present invention is described.

[0023] The BIPV photovoltaic module provided by the embodiment of the first aspect of the present invention includes a laminate 1, a positive and negative electrode connector 3 and a frame 4. The positive and negative electrode lead wires 2 are led out from any edge side of the laminate 1. The positive and negative electrode lead wires 2 are used to lead out the electric energy generated by the laminate so as to connect to the external circuit. The laminate 1 includes a photovoltaic cell group, which can be a crystalline silicon photovoltaic cell or a thin-film photovoltaic cell, and is usually composed of a plurality of photovoltaic cells connected in series and in parallel through wires. The positive and negative electrode connectors 3 have cables, and the positive and negative electrode connectors 3 are used to connect the positive and negative electrode lead wires to external cables or equipment to achieve the transmission of electric energy. The frame 4 is arranged on the outer peripheral side of the laminate 1, and an installation groove is opened on the frame 4; the frame 4 is used to protect the laminate 1 and provide support and installation functions. The positive and negative electrode lead wires 2 and the cables are correspondingly connected in the installation groove, and the installation groove is used to accommodate the connection part of the positive and negative electrode lead wires and the cables to ensure the concealment and safety of the connection, thereby solving the installation problem of the BIPV photovoltaic module.

[0024] In a feasible embodiment of the present invention, the position of the mounting groove corresponds to the position of the positive and negative electrode lead wires 2, which can ensure that the positions of the positive and negative electrode lead wires 2 correspond, and can ensure that the lead wires can be directly and accurately connected to the mounting groove, thereby simplifying the connection process and improving the reliability of the connection. A through hole is provided on the side of the frame 4 corresponding to the position of the positive and negative electrode connector 3 cable, and the cable passes through the through hole. During the connection process, the positive and negative electrode lead wires 2 are first connected to the mounting groove and connected to the corresponding parts of the positive and negative electrode connectors. Then, the cable of the connector passes through the through hole on the frame 4 and is connected to an external circuit or device. This connection method not only ensures the reliability of the connection, but also keeps the components neat and beautiful.

[0025] In a feasible embodiment of the present invention, the mounting groove is arranged on the side, front or back of the frame 4. By arranging the mounting groove on the side of the frame 4, the connection part can be conveniently hidden, and the space on the front or back of the frame 4 will not be occupied, which helps to keep the photovoltaic module neat and beautiful. When the photovoltaic module needs to be directly connected to a nearby electrical device or sensor, arranging the mounting groove on the front can make the connection operation more convenient. Arranging the mounting groove on the back of the frame 4 can provide a concealed connection area without interfering with the front appearance of the photovoltaic module. This design helps to achieve a reliable connection with an external circuit or device while maintaining the aesthetics of the photovoltaic module.

[0026] In a feasible embodiment of the present invention, a conductive metal welding sheet is further included, which is arranged in the installation groove, and the conductive metal welding sheet is used to weld and connect the positive and negative electrode lead wires 2 and the cable. The conductive metal welding sheet is used as a medium for current transmission. The excellent conductivity of the conductive metal welding sheet ensures that the current can be smoothly transmitted from the laminate through the lead wire, the welding sheet, and then to the cable, and finally supplied to the external circuit or device for use.

[0027] In a feasible embodiment of the present invention, the laminate comprises a front layer, a back layer and a battery pack, the battery pack is located between the front layer and the back layer, and the front layer and the back layer are both provided with a packaging film on the side facing away from the battery pack. The positive and negative electrodes of the assembly are located on the side of the edge of the assembly, and the electrodes are led out from the edge between the front layer and the back layer by the positive and negative electrode lead wires 2. By slotting the positive and negative electrode lead wires 2 at the front or back of the frame 4 and punching holes on the side of the frame 4, the cables of the positive and negative electrode connectors 3 are respectively passed through the punched positions of the frame 4, and the positive and negative electrode lead wires 2 are respectively connected to the corresponding positive and negative electrode connector cable terminals by welding.

[0028] Among them, the positive and negative electrode lead wires 2 are led out from between the front layer and the back layer, and can be located at any position around the side of the component.

[0029] It should be noted that the battery pack can be a crystalline silicon photovoltaic battery pack or a thin film photovoltaic battery pack. The battery pack is arranged between the front layer and the back layer. The front layer and the back layer are both provided with upper and lower packaging films that encapsulate the photovoltaic battery pack on the side facing away from the battery pack. Crystalline silicon cells are crystalline silicon photovoltaic cells with low working current; the thin film cells are thin film photovoltaic cells with low working current, including cadmium telluride (CdTe), copper indium gallium selenide (CIGS), perovskite, amorphous silicon thin film cells, etc. A photovoltaic battery pack is composed of multiple photovoltaic cells connected in series or in parallel.

[0030] In a feasible embodiment of the present invention, at least one of the front layer and the back layer is glass. The front layer and the back layer can be high-transparency glass front glass, and the back glass and the thin-film battery group together form a double-glass battery assembly. The back layer can also be ethylene-tetrafluoroethylene copolymer (ETFE), PET (including CPC or K film) film material, and the back layer of PET, ETFE film material, the front glass and the photovoltaic battery group together form a single-glass photovoltaic module; the front layer and the back layer can also be high-transparency, high-reliability and strength organic polymer film composite board, and together with the battery group form a composite differentiated photovoltaic module. The glass thickness and mechanical strength can be set according to the installation scenario of the component. For example, if it is installed on the curtain wall or roof of the building, tempered glass can be used, and the glass thickness can be increased in the cold north. The single-glass photovoltaic module composed of the back layer of PET, ETFE film material, the front glass and the photovoltaic battery group can be installed on the building curtain wall that does not need to be light-transmitted, or other buildings that do not need to be light-transmitted. In this embodiment, a double-glass module composed of a light-transmitting front / glass and a light-transmitting photovoltaic cell is selected as an application example.

[0031] In addition, the frame 4 is grooved at the positions of the positive and negative electrode lead-out wires 2, and the length of the groove is 5-20mm larger than the width of the welding terminals of the positive and negative electrode lead-out wires 2. Holes are punched at the cable lead-out frame positions of the positive and negative electrode connectors 3 corresponding to the side of the frame 4, and the hole diameter is 0.5-1mm larger than the diameter of the cable. The positive and negative electrode connectors 3 pass through the corresponding punching positions on the side of the frame, and the hole positions are between 30-100mm away from the corresponding grooves.

[0032] In a feasible embodiment of the present invention, the installation groove is filled with an insulating sealant 7 for sealing. The insulating sealant 7 has excellent insulation performance, can effectively isolate electrical components, prevent current leakage and short circuit, and has good sealing performance, can tightly fill the gap of the installation groove, and prevent external impurities such as moisture and dust from entering the photovoltaic module. The insulating sealant 7 can also provide certain anti-seismic and weather-resistant performance. During the operation of the photovoltaic module, it may be eroded by natural environments such as wind, rain, snow, and mechanical stress. The insulating sealant can absorb and disperse these stresses to protect the photovoltaic module from damage.

[0033] In a feasible embodiment of the present invention, waterproof insulating sealant 7 is supplied and sealed at the metal welding sheet exposed at the notch, the metal wire welding port of the positive and negative electrode connector 3, and the welding part of the positive and negative electrode lead wires 2, and is filled to overflow the hole of the cable at the punching position of the frame 4. Furthermore, a slot cover is provided at the slot position, which needs to be an insulating material cover, or affixed with plastic tape, and maintains a uniform level with the side of the frame 4.

[0034] In other embodiments, structural adhesive or other types of sealants may be used.

[0035] In a feasible embodiment of the present invention, a bus bar 5 is provided inside the laminate 1, and the bus bar 5 is connected to the positive and negative electrode lead wires 2, and an anti-reverse diode string 6 is also provided between the bus bar 5 and the positive and negative electrode lead wires 2. The bus bar 5 is arranged between the laminates 1, which helps to collect and aggregate the electric energy generated by each laminate 1. The bus bar 5 is further connected to the positive and negative electrode lead wires 2, and the function of the positive and negative electrode lead wires 2 is to lead out the converged electric energy for subsequent use or storage. In order to improve the safety and reliability of the system, an anti-reverse diode string 6 is also specially provided between the bus bar 5 and the positive and negative electrode lead wires 2. The main function of the anti-reverse diode string 6 is to prevent the current from flowing in the reverse direction, that is, it can ensure that the electric energy can only flow from the laminate through the bus bar 5 to the positive and negative electrode lead wires 2 in a predetermined direction without reverse leakage.

[0036] Furthermore, the bus bar 5, the positive and negative electrode lead wires 2 and the anti-reverse diode string 6 are all located at the edge of the glass. The length of the positive and negative electrode lead wires 2 extending beyond the edge of the glass along the long side direction is between 5 and 10 mm, and the overlapping length of the other end along the long side direction with the bus bar 5 is consistent with the width of the bus bar 5. The positive and negative electrode lead wire 2 ports and the positive and negative electrode connector 3 welding ports and the conductive metal welding sheet are all integrated in the frame slot.

[0037] In a feasible embodiment of the present invention, the lead-out ports of the positive and negative electrode lead-out wires 2 extend beyond the edge of the glass and are respectively connected to the exposed metal wire terminals at the tail of the positive and negative electrode connectors 3 by welding at the slotted positions.

[0038] In a feasible embodiment of the present invention, the bus bar 5 and the positive and negative electrode lead wires 2 are both located at the edge of the glass, the overall thickness of the bus bar 5 lead wire is consistent with the overall thickness of the bus bar 5, the thickness of the bus bar 5 lead wire port and the bus bar 5 port welding position is between one-half and three-quarters of the bus bar thickness, and an insulating isolation strip is provided before lamination, which is beneficial to improve the flatness of the component after lamination and electrically insulate and isolate the positive and negative electrode lead wires 2. Among them, the insulating isolation strip composition material can be an insulating material such as EPE, EVA, etc., and the isolation strip can form a long-lasting and effective bond with the packaging film EVA or POE after lamination.

[0039] In a feasible embodiment of the present invention, the frame 4 is a plastic frame, the slotted positions of the plastic frame are covered with an insulating plastic cover or affixed with a plastic tape, and the same flatness is maintained on the side of the frame 4 .

[0040] The BIPV photovoltaic module provided by the present invention has no junction box located on the front / back of the module, and the module electrode cables are led out from the side of the module, which is convenient for the installation and integration of the module and helps to improve the aesthetics of the module. As a part of the BIPV building, it is integrated and installed in the curtain wall and the roof. The version of the module can be made into different power modules of any version according to the requirements of the building structure, and directly adapted to the building structure frame. The photovoltaic module can achieve the front / back of the module without a junction box and a cable, which improves the aesthetics of the front / back of the module. The welding terminals connecting the positive and negative electrode connectors and the electrode lead wires are integrated in the frame 4, which improves the overall aesthetics of the BIPV module. In addition, the bus bar 5 is located at the edge of the glass of the module, which is conducive to encapsulation in the frame 4 and the installation of the module frame 4 in the building to cover the bus bar 5, and the appearance color of the bus bar 5 is very close to the color of the short side frame, which can achieve the overall aesthetics of the module.

[0041] The photovoltaic curtain wall device provided by the present invention is described below. The photovoltaic curtain wall device described below and the BIPV photovoltaic assembly described above can be referenced to each other.

[0042] The present invention provides a photovoltaic curtain wall, comprising the BIPV photovoltaic module as described above.

[0043] The photovoltaic curtain wall provided by the present invention includes a plurality of BIPV photovoltaic modules connected in series, so there is no junction box located on the front / back of the module, and the module electrode cable is led out from the side of the module, which is convenient for the assembly installation and integration, and helps to improve the aesthetics of the module. As a part of the BIPV building body, it is integrated and installed in the curtain wall and the roof. The module version can be made into different power modules of any version according to the requirements of the building structure, and directly adapted to the building structure frame. The photovoltaic module can realize the front / back of the module without a junction box and a cable, which improves the aesthetics of the front / back of the module. The welding terminals connecting the positive and negative electrode connectors and the electrode lead wires are integrated in the frame 4, which improves the overall aesthetics of the BIPV module. In addition, the bus bar 5 is located at the glass edge of the module, which is conducive to encapsulation in the frame 4 and the installation of the module frame 4 in the building to cover the bus bar 5, and the appearance color of the bus bar 5 is very close to the color of the short side frame, which can achieve the overall aesthetics of the module. There is no junction box blocking the front and back, so it can be installed as a BIPV integration in the building, and can be used as a component of the curtain wall or roof. At the same time, the cables of the positive and negative electrode connectors 3 installed on the side of the component can be hidden in the building frame, and the overall appearance is relatively flat and beautiful.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A BIPV photovoltaic module, characterized in that: include: The laminate (1) has positive and negative electrode lead wires (2) extending from any edge side thereof; A positive and negative electrode connector (3) having a cable; A frame (4) is arranged on the outer peripheral side of the laminate (1), and a mounting groove is provided on the frame (4); and the positive and negative electrode lead wires (2) and the cables are correspondingly connected in the mounting groove.

2. The BIPV photovoltaic module according to claim 1, characterized in that: The position of the mounting groove corresponds to the position of the positive and negative electrode lead wires (2), and a through hole is provided on the side of the frame (4) corresponding to the position of the positive and negative electrode connector (3) cable, and the cable passes through the through hole.

3. The BIPV photovoltaic module according to claim 1, characterized in that: The mounting groove is arranged on the side, front or back of the frame (4).

4. The BIPV photovoltaic module according to claim 1, characterized in that: Also includes: A conductive metal welding sheet is arranged in the installation groove, and the conductive metal welding sheet is used to weld the positive and negative electrode lead wires (2) and the cable together.

5. The BIPV photovoltaic module according to claim 1, characterized in that: The laminate (1) comprises a front layer, a back layer and a battery pack, the battery pack is located between the front layer and the back layer, and a packaging film is provided on the side of the front layer and the back layer facing away from the battery pack.

6. The BIPV photovoltaic module according to claim 5, characterized in that: At least one of the front layer and the back layer is glass.

7. The BIPV photovoltaic module according to claim 1, characterized in that: The installation groove is filled with insulating sealant (7) for sealing.

8. The BIPV photovoltaic module according to claim 6, characterized in that: A bus bar (5) is arranged inside the laminate (1), the bus bar (5) is connected to the positive and negative electrode lead wires (2), and an anti-reverse diode string (6) is also arranged between the bus bar (5) and the positive and negative electrode lead wires (2).

9. The BIPV photovoltaic module according to claim 8, characterized in that: The bus bar (5) and the positive and negative electrode lead wires (2) are both located at the edge of the glass.

10. A photovoltaic curtain wall, characterized in that: Comprising the BIPV photovoltaic module as described in any one of claims 1 to 9.

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