Photovoltaic module and photovoltaic system
By introducing reinforcing components into photovoltaic modules, the problem of excessively close distance between the lead wires and the front panel during the lamination process of lightweight photovoltaic modules was solved, thereby improving the electrical safety and stability of the modules.
Patent Information
- Application Number
- CN202423204560.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-24
AI Technical Summary
During the lamination process of lightweight photovoltaic modules, if the lead wires are too close to the front panel, it can lead to electrical safety risks and affect the safety and reliability of the modules.
Introducing reinforcement components into photovoltaic modules, placed between the leads and the cell strings, corresponding to the openings in the backsheet, disperses the pressure at the bends of the leads during lamination, prevents the encapsulant film from being squeezed out, and improves electrical safety.
By adding reinforcing components, the electrical safety risks associated with insufficient thickness at the lead wire opening locations after lamination are reduced, thereby improving the safety, reliability, and stability of the photovoltaic modules.
Smart Images
Figure CN223681434U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic technology field especially relates to a photovoltaic module and photovoltaic system. BACKGROUND
[0002] The photovoltaic module is a kind of power generation device for converting light energy into electric energy using photovoltaic effect, which is mainly made of photovoltaic material (such as silicon), and can generate electricity under sunlight by absorbing photons to excite electrons and form electric current. The cell includes a front electrode, a photovoltaic layer and a back electrode, and can generate electricity under sunlight, and is widely used in power generation systems and various electronic devices.
[0003] In the related art, the front plate of the lightweight photovoltaic module is soft and thin, so that the insulating film is easily extruded and removed at the opening of the back plate of the lightweight photovoltaic module during the lamination process, resulting in a too close distance between the lead-out wire and the front plate, and the photovoltaic module has an electrical safety risk, and the safety and reliability of the photovoltaic module are insufficient. SUMMARY
[0004] The utility model provides a kind of photovoltaic module and photovoltaic system to solve the problem of insufficient safety and reliability of photovoltaic module in prior art.
[0005] The utility model embodiment is implemented as follows: the utility model provides a kind of photovoltaic module and photovoltaic system. The photovoltaic module includes: front plate, cell string, back plate that are sequentially stacked, and adhesive film is arranged between the front plate and the cell string and between the cell string and the back plate;The photovoltaic module further includes bus bar and lead-out wire, the back plate is provided with a plurality of openings, one end of the lead-out wire is connected to the bus bar;The other end of the lead-out wire is bent relative to the bus bar and passes out of the opening;The photovoltaic module further includes reinforcing member, and the reinforcing member is arranged between the lead-out wire and the cell string and is correspondingly arranged with the opening.
[0006] Further, the reinforcing member is an insulating member.
[0007] Further, the reinforcing member is a transparent member.
[0008] Further, the reinforcing member includes a substrate and an adhesive layer arranged on at least one side of the substrate.
[0009] Further, the adhesive layer is an acrylic adhesive layer, a silicone adhesive layer, an EVA adhesive layer, a POE adhesive layer or a PVB adhesive layer.
[0010] Further, the substrate is a PET substrate, a PI substrate, an EVA substrate, a POE substrate or a PVB substrate.
[0011] Further, the reinforcing member comprises an adhesive substrate.
[0012] Further, the reinforcing member has a breakdown voltage greater than or equal to 100 V.
[0013] Further, the reinforcing member covers and exceeds the gap at the bending position of the two adjacent lead-out wires.
[0014] Further, the reinforcing member covers the corner of the four adjacent battery pieces.
[0015] The utility model embodiment further provides a photovoltaic system, the photovoltaic system includes a plurality of as above-mentioned photovoltaic module.
[0016] In the utility model, since the reinforcing member corresponding to the opening of the back plate is arranged between the lead-out wire and the battery string, the pressure applied at the bending position of the lead-out wire during the laminating process can be dispersed, the glue film is prevented from being squeezed away by the lead-out wire, the electrical safety risk caused by the too small thickness of the opening position of the lead-out wire after laminating is reduced, and the safety and reliability of the photovoltaic module are improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0018] Figure 1 It is the module schematic view of the photovoltaic system provided by the utility model embodiment;
[0019] Figure 2 It is the layout schematic view of the photovoltaic module provided by the utility model embodiment;
[0020] Figure 3 It is the cross-sectional structure schematic view of the photovoltaic module provided by the utility model embodiment;
[0021] Figure 4 It is Figure 3 It is the structure schematic view of the reinforcing member in the photovoltaic module;
[0022] Figure 5 It is Figure 3 It is another structure schematic view of the reinforcing member in the photovoltaic module;
[0023] Figure 6 It is Figure 3Another structure diagram of the reinforcing member in the photovoltaic module.
[0024] Main element symbol explanation: 1000, photovoltaic system; 100, photovoltaic module; 10, reinforcing member; 20, front plate; 30, cell string; 40, back plate; 50, busbar; 60, lead-out wire; 70, adhesive film; 31, cell piece; 41, opening; 11, base plate; 12, adhesive layer. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the present application clearer, the following further describes the present application in combination with the drawings and examples. The examples described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application. In addition, it should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0026] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "top", "bottom", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0027] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0028] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0029] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature.The first feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.
[0030] The disclosure below provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can refer to the same reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed per se. In addition, the utility model provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0031] Please refer to Figure 1 The photovoltaic system 1000 in the embodiment of the utility model can include the photovoltaic assembly 100 in the embodiment of the utility model. It should be noted that the drawings provided by the application are schematic drawings, and some elements are not displayed in the drawings. The purpose is to clearly describe the technical scheme and highlight the utility model. It is not intended to limit the technical scheme and not include these undisplayed elements. That is to say, the drawings are only examples and do not represent a specific form of the photovoltaic assembly 100.
[0032] As Figure 2 And Figure 3 As shown in the drawings, the photovoltaic assembly 100 includes a front plate 20, a cell string 30, and a back plate 40 arranged in sequence, and a glue film 70 is arranged between the front plate 20 and the cell string 30 and between the cell string 30 and the back plate 40. The photovoltaic assembly 100 further includes a bus bar 50 and a lead wire 60, the back plate 40 is provided with a plurality of openings 41, one end of the lead wire 60 is connected to the bus bar 50, the other end of the lead wire 60 is bent relative to the bus bar 50 and passes through the opening 41. The photovoltaic assembly 100 further includes a reinforcing member 10, the reinforcing member 10 is arranged between the lead wire 60 and the cell string 30 and is arranged correspondingly to the opening 41. The cell string 30 specifically includes a cell sheet 31 and a solder strip.
[0033] Specifically, the back plate 40 is provided with a plurality of openings 41, the bus bar 50 is connected with the lead-out wire 60, and the lead-out wire 60 passes through the opening 41 of the back plate 40 after being bent. The reinforcing member 10 is located between the lead-out wire 60 and the battery string 30, and the setting position of the reinforcing member 10 corresponds to the position of the opening 41 of the back plate 40. That is, the reinforcing member 10 is arranged at the opening 41 of the back plate 40, or in other words, the reinforcing member 10 is arranged at the bending position of the lead-out wire 60.
[0034] Therefore, in the utility model, since the reinforcing member 10 corresponding to the opening 41 of the back plate 40 is arranged between the lead-out wire 60 and the battery string 30, the electrical safety risk caused by the too small thickness of the opening 41 of the lead-out wire 60 in the photovoltaic module 100 can be avoided, thereby improving the safety and reliability of the photovoltaic module 100.
[0035] Specifically, the lead-out wire 60 can be formed by bending the bus bar 50 itself, or in other words, the lead-out wire 60 and the bus bar 50 can be integrally arranged. Of course, the lead-out wire 60 and the bus bar 50 can also be two independent parts, which is not limited here.
[0036] In addition, the arrangement of the reinforcing member 10 can help to disperse the pressure applied to the bending position of the lead-out wire 60 during the lamination process, prevent the adhesive film 70 from being squeezed out, and achieve the effect of improving the safety, stability and reliability of the photovoltaic module 100.
[0037] It is worth noting that the opening 41 is a lead-out hole of the lead-out wire 60, and the lead-out wire 60 is bent and led out from the opening 41 for conductive connection.
[0038] For example, the reinforcing member 10 can be a transparent member. Optionally, the light transmittance of the reinforcing member 10 is more than 70%. The reinforcing member 10 can be a transparent substrate. The transparent reinforcing member 10 will not block light, so when the transparent reinforcing member 10 is placed inside the photovoltaic module 100, it will not affect the light receiving of the battery string 30, and the power generation efficiency of the photovoltaic module 100 will not be affected. In addition, the transparent reinforcing member 10 facilitates the viewing of the internal structure of the photovoltaic module 100, and the state of the adhesive film 70 and the lead-out wire 60 inside the photovoltaic module 100 can be directly observed during detection and maintenance, thereby achieving the effect of helping to quickly locate the possible problem area.
[0039] For example, the reinforcing member 10 can also be a black reinforcing member 10 or a white reinforcing member. In this way, the aesthetic appearance of the reinforcing member 10 arranged in the photovoltaic module 100 can be improved. Figure 2 Figure 3 As shown in FIGS. 1 to 6, for the reinforcing member 10, in one possible implementation, the reinforcing member 10 is an insulating member.
[0040] Specifically, the reinforcing member 10 can be arranged as an insulating member. In this way, the electrical isolation between the lead-out wire 60 and the battery string 30 can be further enhanced, and the risk of electrical safety due to the small thickness of the opening 41 of the lead-out wire 60 in the photovoltaic module 100 can be further avoided, thereby improving the safety and reliability of the photovoltaic module 100.
[0041] Further, for the reinforcing member 10, in a possible implementation, the thickness of the reinforcing member 10 is 100 μm to 400 μm. Specifically, arranging the thickness of the reinforcing member 10 to be 100 μm to 400 μm can provide the reinforcing member 10 with sufficient mechanical strength and support without increasing the risk of hidden cracks of the battery sheet 31 in the manufacturing process of the photovoltaic module 100, ensure that the lead-out wire 60 and the battery string 30 remain stable during the lamination process, avoid deformation or damage of the photovoltaic module 100 due to excessive lamination pressure, and achieve the effect of improving the electrical safety of the photovoltaic module 100.
[0042] Preferably, the thickness of the reinforcing member 10 can be specifically arranged to be 100 μm, 150 μm, 200 μm, 250 μm, or 300 μm. In this way, the reinforcing member 10 can have good mechanical and electrical properties and meet the process requirements of the photovoltaic module 100.
[0043] Further, for the reinforcing member 10, in a possible implementation, the reinforcing member 10 covers and exceeds the gap between the bending portions of the adjacent two lead-out wires 60. In this way, the reinforcing member 10 can completely cover the bending portions of the lead-out wire 60, provide reliable electrical isolation and physical protection for the lead-out wire 60, prevent the adhesive film 70 from being squeezed out, and achieve the effect of improving the safety and reliability of the photovoltaic module 100.
[0044] Further, in a possible implementation, the battery string 30 includes a plurality of battery sheets 31, and the reinforcing member 10 covers the corners of the adjacent four battery sheets 31. As shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, because the openings 41 are located between the corners of the adjacent four battery sheets, the reinforcing member 10 is arranged to cover the corners of the adjacent four battery sheets 31, and the reinforcing member can completely cover the openings to provide reliable electrical isolation and physical protection for the lead-out wire 60, prevent the adhesive film 70 from being squeezed out, and achieve the effect of improving the safety and reliability of the photovoltaic module 100. At the same time, the battery sheet 31 can also support the reinforcing member 10 and improve the setting stability of the reinforcing member 10. Figure 2 Figure 3
[0045] It is noted that the "edge corner of the cell tab 31 refers to" the corner area located at the edge portion of the cell tab 31. For example, the edge corner of the cell tab 31 can be formed by two edges that are perpendicular to each other, and the edge corner of the cell tab 31 is 90°. For example, the edge corner of the cell tab 31 can also be formed by two edges that are not perpendicular to each other, and the edge corner of the cell tab 31 is 30°, 45°, 60° or other angles. For example, the edge corner of the cell tab 31 can also be formed by a curved edge.
[0046] Specifically, the reinforcing member 10 can be arranged in a rectangular shape. In the extension direction of the cell tab 31, the width of the reinforcing member 10 is 0.1mm to 10mm. It is noted that the width of the reinforcing member 10 in the extension direction of the cell tab 31 is 0.1mm to 10mm in the following description. Figure 2
[0047] Specifically, the width of the reinforcing member 10 in the extension direction of the cell tab 31 is arranged to be 0.1mm to 10mm, which can make the reinforcing member 10 completely cover the opening 41 of the backsheet 40, so that the reinforcing member 10 can ensure sufficient electrical isolation between the lead-out wire 60 and the opening 41 of the backsheet 40 in the lamination process, avoiding short circuit or electrical failure caused by the exposed part of the lead-out wire 60 due to the opening 41. In addition, the width of the reinforcing member 10 in the extension direction of the cell tab 31 is arranged to be 0.1mm to 10mm, which can also ensure that the width of the reinforcing member 10 covers the opening 41 of the backsheet 40, effectively protecting the electrical connection components (such as the lead-out wire 60) inside the module from the external environment, preventing dust, moisture or pollutants from entering the opening 41 area, and achieving the effect of enhancing the sealing and protection performance of the photovoltaic module 100.
[0048] Preferably, the width of the reinforcing member 10 in the extension direction of the cell tab 31 can be arranged to be 0.1mm, 0.5mm, 1mm, 5mm or 10mm. In this way, the reinforcing member 10 can play the best role in protecting the lead-out wire 60 and enhancing electrical isolation, and improve the overall performance and reliability of the photovoltaic module 100. In addition, the distance between the bending parts of the adjacent two lead-out wires 60 can be arranged to be less than the width of the reinforcing member 10 in the extension direction of the cell tab 31, and / or the width of the reinforcing member 10 in the opposite direction of the extension direction of the cell tab 31 can be arranged to be greater than the distance between the adjacent two cell strings 30. In this way, the reinforcing member 10 can completely cover the gap between the bending parts of the adjacent two lead-out wires 60, and cover the edge corner positions of the adjacent four cell tabs 31. The reliable electrical isolation layer between the adjacent cell strings 30 can be formed by the reinforcing member 10, avoiding the risk of short circuit or electric leakage caused by accidental conduction or electric field interference between the cell strings 30, ensuring the safety of the photovoltaic module 100 in a high voltage environment, and further achieving the effect of improving the safety, stability and reliability of the photovoltaic module 100.
[0049] In addition, the reinforcing member 10 can also cover the area between adjacent battery strings 30, effectively filling and isolating the gaps, ensuring the integrity of the internal structure of the photovoltaic module 100, preventing external environmental factors (such as moisture and dust) from entering the gap between the battery strings 30, and improving the sealing and protection effect of the photovoltaic module 100. It is noted that the width of the reinforcing member 10 in the direction opposite to the extension direction of the battery sheet 31 is represented by Y. Figure 2
[0050] Further, for the reinforcing member 10, in a possible implementation, the breakdown voltage of the reinforcing member 10 is greater than or equal to 100V. Specifically, the breakdown voltage of the reinforcing member 10 can be set to be greater than or equal to 100V, and the breakdown voltage of the reinforcing member 10 greater than or equal to 100V means that during the operation of the photovoltaic module 100, even if voltage fluctuations or accidental overvoltage occur, the reinforcing member 10 can still effectively maintain electrical isolation, prevent the lead-out wire 60 or the battery string 30 from electrical short circuit or poor contact, and thus achieve the effect of ensuring the long-term safe operation of the photovoltaic module 100.
[0051] Preferably, the breakdown voltage of the reinforcing member 10 can be set to 100V, 220V, to achieve the effect of improving the electrical safety of the photovoltaic module 100.
[0052] Further, for the reinforcing member 10, as shown in Figure 4 and Figure 5 in a possible implementation, the reinforcing member 10 includes a substrate 11 and an adhesive layer 12 arranged on at least one side of the substrate 11. Specifically, the reinforcing member 10 can be specifically composed of the substrate 11 and the adhesive layer 12, and the adhesive layer 12 is arranged on at least one side of the substrate 11. In the embodiment of the present application, the adhesive layer 12 arranged on one side or both sides can firmly fix the reinforcing member 10 in the structure of the photovoltaic module 100, to improve the stability and firmness of the structure of the reinforcing member 10, and ensure that the reinforcing member 10 does not shift during the lamination process, and further achieve the effect of improving the overall stability of the photovoltaic module 100. Of course, preferably, the adhesive layer 12 can be arranged on both upper and lower sides of the substrate 11, to further improve the stability and firmness of the structure of the reinforcing member 10. In addition, for the adhesive layer 12, the adhesive layer 12 can also be formed in the form of a film.
[0053] Further, for the substrate 11, in a possible implementation, the substrate 11 can be a PET (polyethylene terephthalate) substrate 11, a PI (polyimide) substrate 11, an EVA (ethylene-vinyl acetate copolymer) substrate 11, a POE (polyolefin elastomer) substrate 11, or a PVB (polyvinyl butyral) substrate 11.
[0054] For the adhesive layer 12, the adhesive layer 12 can be an acrylic adhesive layer 12, a silica gel adhesive layer 12, an EVA (ethylene-vinyl acetate copolymer) adhesive layer 12, a POE (polyolefin elastomer) adhesive layer 12, or a PVB (polyvinyl butyral) adhesive layer 12. Of course, in other embodiments, the adhesive layer 12 can also be composed of other adhesive materials.
[0055] Further, for the reinforcing member 10, as shown in Figure 6 in a possible implementation, the reinforcing member 10 includes an adhesive substrate 13. Thus, since the reinforcing member 10 includes the adhesive substrate 13, the adhesive substrate 13 itself has adhesion, so that when the reinforcing member 10 is arranged, no additional adhesive structure or adhesive film needs to be arranged to bond the reinforcing member, so as to reduce cost and improve the arrangement efficiency of the reinforcing member. Alternatively, the adhesive substrate 13 can specifically be a composite substrate composed of a multi-layer structure. Alternatively, the adhesive substrate 13 can also specifically be a single-layer substrate, which is not limited herein.
[0056] In the description of the present specification, the description referring to the terms "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0057] In addition, the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A photovoltaic module, characterized by, The photovoltaic module comprises a front plate, a battery string and a back plate which are sequentially stacked, and a glue film is arranged between the front plate and the battery string and between the battery string and the back plate. The photovoltaic module further comprises a busbar and a lead-out wire, the back plate is provided with a plurality of openings, one end of the lead-out wire is connected to the busbar, the other end of the lead-out wire is bent relative to the busbar and passes through the openings. The photovoltaic module further comprises a reinforcing member, the reinforcing member is arranged between the lead-out wire and the battery string and corresponds to the openings. The reinforcing member is an insulating member.
2. The photovoltaic module of claim 1, wherein, The reinforcing member is a transparent member.
3. The photovoltaic module of claim 1, wherein, The reinforcing member comprises a substrate and an adhesive layer arranged on at least one side of the substrate.
4. The photovoltaic module of claim 1, wherein, The adhesive layer is an acrylic adhesive layer, a silica gel adhesive layer, an EVA adhesive layer, a POE adhesive layer or a PVB adhesive layer.
5. The photovoltaic module of claim 4, wherein, The substrate is a PET substrate, a PI substrate, an EVA substrate, a POE substrate or a PVB substrate.
6. The photovoltaic module of claim 4, wherein, The reinforcing member comprises an adhesive substrate.
7. The photovoltaic module of claim 1, wherein, The thickness of the reinforcing member is 100-400 μm.
8. The photovoltaic module of claim 1, wherein, The breakdown voltage of the reinforcing member is greater than or equal to 100 V.
9. The photovoltaic module of claim 1, wherein, The reinforcing member covers and exceeds the gap between the bent portions of two adjacent lead-out wires.
10. The photovoltaic module of claim 1, wherein, The battery string comprises a plurality of battery pieces, and the reinforcing member covers the corners of four adjacent battery pieces.
11. The photovoltaic module of claim 1, wherein, The photovoltaic module comprises a plurality of photovoltaic modules according to any one of claims 1-11.
12. A photovoltaic system characterized by,