Photovoltaic module and photovoltaic roofing system

Abstract

The present application relates to the technical field of photovoltaics. Disclosed are a photovoltaic module and a photovoltaic roofing system, so as to solve the problem of the irrational arrangement of supporting members on a photovoltaic module. The photovoltaic module comprises: a module body and at least two supporting assemblies connected to a lower surface of the module body, wherein the module body has two first sides arranged opposite each other and two second sides arranged opposite each other; the at least two supporting assemblies are arranged in a first direction, the first direction being parallel to the first sides; each supporting assembly comprises one or more supporting members, the plurality of supporting members being arranged in a second direction, and the second direction being parallel to the second sides; in the first direction, the supporting assemblies at two ends among the at least two supporting assemblies are respectively arranged at the edge positions of the two second sides; and in the first direction, the distance between the corresponding supporting members in two adjacent supporting assemblies is denoted as lb1, the equivalent thickness of the module body is teq, the allowable stress of the module body is (I), the pressure exerted on a surface of the module body is P, and the bending moment coefficient of the module body is km, lb1 satisfying: (II). The present application optimizes the positions where the supporting members are arranged on the photovoltaic module, thus improving the support stability and reliability of the photovoltaic module.

Description

Photovoltaic module and photovoltaic roof system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and benefits of Chinese patent application No. 202311509214.7, filed on November 14, 2023, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module and a photovoltaic roofing system. Background Art

[0004] Solar energy is a clean and renewable energy source. In the current development of the photovoltaic industry, solar photovoltaic power generation systems are being used more and more in China, and distributed photovoltaic power stations are becoming increasingly important. Among them, photovoltaic modules, as an important component of photovoltaic power stations, are also becoming increasingly important.

[0005] Photovoltaic modules are installed on the roof. Due to their large size, they are subject to large positive and negative loads, which causes large deformation of the photovoltaic modules. If the supports on the photovoltaic modules are not set properly, the photovoltaic modules may be easily damaged by external loads.

[0006] Summary of the Invention

[0007] The purpose of this application is to provide a photovoltaic module and a photovoltaic roof system to optimize the setting position of the support members on the photovoltaic module and improve the support stability and reliability of the photovoltaic module.

[0008] To achieve the above objectives, in a first aspect, the present application provides a photovoltaic module, comprising:

[0009] A component body and at least two groups of support components connected to the lower surface of the component body, the component body having two oppositely disposed first sides and two oppositely disposed second sides, the first sides and the second sides being perpendicular; the at least two groups of support components are arranged along a first direction, the first direction being parallel to the first sides, each group of support components includes one or more support members, the multiple support members are arranged along a second direction, the second direction being parallel to the second sides;

[0010] Along the first direction, the support assemblies at both ends of the at least two groups of support assemblies are respectively arranged at edge positions of the two second sides;

[0011] Along the first direction, the distance between the corresponding support members of two adjacent support assemblies is expressed as l b1 , the equivalent thickness of the component body is t eq , the allowable stress of the component body is [σ], the pressure on the surface of the component body is P, and the bending moment coefficient of the component body is k m, l b1 satisfy:

[0012] When the above technical solution is adopted, the photovoltaic module itself has a module body and a support module connected together. The module body is a rectangular plate structure with a pair of first sides and a pair of second sides. The first sides and the second sides are perpendicular. At least two groups of support modules are arranged in a direction parallel to the first sides. Along the first direction, the support modules at both ends of at least two groups of support modules are respectively arranged at the edge positions of the two second sides of the module body, that is, there is no overhanging cantilever structure between the support module and the adjacent second side. The support method of the photovoltaic module in the first direction can be treated as a simply supported beam. A section between two adjacent support members arranged along the first direction forms a simply supported portion. The distance of the simply supported portion is expressed as l b1 The allowable stress and bending moment coefficient of the module body are determined based on the material and size of the cover and back plate selected for the module body. The equivalent thickness is determined based on the material and thickness of the cover and back plate of the module body. When the structure, material, size and external load of the module body are determined, the distance of the simply supported parts is designed to satisfy the above formula. The arrangement position of the support member on the module body can ensure that when the photovoltaic module is actually subjected to external loads such as wind pressure, wind suction, snow accumulation, hail, and trampling, the deformation of the parts of the module body located on both sides of the support member in the first direction along the direction of gravity is evenly distributed, and the stress generated is roughly the same and small. The position setting of the support member is more reasonable, which improves the support stability and reliability of the photovoltaic module. By optimizing the position and design of the support member, the photovoltaic module's ability to resist hidden cracks is effectively improved, and it can resist the influence of various environmental factors, ensuring the stable operation of the photovoltaic module.

[0013] In some possible implementations, Thus, by adding a safety factor to the formula, the better setting position of the support in actual engineering applications is better satisfied to ensure that the obtained l b1 The value can meet the support stability requirements of photovoltaic modules and further improve the anti-hidden cracking ability of photovoltaic modules.

[0014] In some possible implementations, each support assembly includes at least two support members arranged along the second direction; in the same support assembly, the distance between two adjacent support members is expressed as l b2 , l b2 satisfy:

[0015] When the above technical solution is adopted, in the second direction, at least two support members are also provided in the same second direction, and a simply-branched portion is also formed between two adjacent support members. The distance l between the simply-branched portions formed by the arrangement positions of the support members on the component body is the same as that in the first direction. b2 satisfy: The arrangement position of the support member on the component body can ensure that when the photovoltaic component is actually subjected to external loads such as wind pressure, wind suction, snow accumulation, hail, and trampling, the deformation of the parts of the component body located on both sides of the support member along the direction of gravity is evenly distributed in the second direction, and the stress generated is roughly the same and the stress is relatively small. The position setting of the support member is more reasonable, thereby improving the support stability and reliability of the photovoltaic component.

[0016] In some possible implementations, Thus, by adding a safety factor to the formula, the better setting position of the support in actual engineering applications is better satisfied to ensure that the obtained l b2 The value can meet the support stability requirements of photovoltaic modules and further improve the anti-hidden cracking ability of photovoltaic modules.

[0017] In some possible implementations, each support assembly includes at least two support members arranged along the second direction; in the same support assembly, the distance between two adjacent support members is expressed as l b2 , when l b2 >2l b1 When b2 satisfy: In this way, when the distance between the two support members in the second direction is much larger than the distance between the two support members in the first direction, the support of the photovoltaic module can be treated as a one-way beam. The distance between the support members in the second direction calculated according to this formula is more suitable for the better setting position of the support members in actual engineering applications, so as to ensure the obtained l b2 The value can meet the support stability requirements of photovoltaic modules.

[0018] In some possible implementations, the component body is a single-glass component, and the equivalent thickness of the component body is t eq is the thickness of single glass; or the component body is a double glass component, the thickness of the upper glass is t1, the thickness of the lower glass is t2, and the equivalent thickness of the component body is t eq satisfy:

[0019] When adopting the above technical solution, since the main material that can bear the load in the photovoltaic module is the glass material on one or two sides, the equivalent thickness of the module body can only consider the thickness of the glass. If there is glass on only one side, the equivalent thickness of the module body is the thickness of this layer of glass. If there is glass on both sides, the equivalent thickness and the thickness of the upper and lower layers of glass satisfy the above formula.

[0020] In some possible implementations, the maximum distance between two adjacent support members in the same direction is expressed as l bmax , meeting 206.2mm≤l bmax ≤486.9mm.

[0021] In some possible implementations, the length of the first side is L1, and the length of the second side is L2; ​​along the first direction, the support assemblies at both ends of the at least two groups of support assemblies are respectively arranged at the edge positions of the two second sides of the assembly body; b1max l b1 The maximum value; the number of the support components arranged along the same first direction is represented by m, the width of each support member in the first direction is x, symbol Indicates rounding up.

[0022] When adopting the above technical solution, based on the side length of the first side, the first adjacent edge spacing, the maximum distance between two adjacent support members in the first direction and the width of the support member in the first direction, the minimum number of support members arranged in the same first direction can be calculated to meet the support requirements.

[0023] In some possible implementations, the length of the first side is L1, and the length of the second side is L2; ​​along the second direction, the support members at both ends of each support assembly are respectively arranged at the edge positions of the two first sides of the assembly body; b2max l b2 The maximum value; the width of each support member in the second direction is s, the number of support members arranged along the same second direction is expressed as k, the width of each support member in the second direction is s, symbol Indicates rounding up.

[0024] When adopting the above technical solution, the minimum number of support members arranged in the same second direction can be calculated based on the length of the second side, the second adjacent edge spacing, the maximum spacing between two adjacent support members in the second direction and the width of the support member in the second direction, which can meet the support requirements.

[0025] In some possible implementations, each support assembly includes at least two support members arranged along the second direction, with the support members at both ends of each support assembly being positioned at the edges of the two first sides of the assembly body. In this manner, there is no overhanging cantilever structure between the support assembly and the adjacent first side, and the support method for the photovoltaic assembly in the second direction can be treated as a simply supported beam.

[0026] In some possible implementations, the at least two groups of support assemblies are specifically at least three groups of support assemblies, and in the first direction, the at least three groups of support assemblies are arranged at equal intervals. This arrangement can ensure that the bending moments between the support members on the assembly body are the same, and the support is more stable.

[0027] In some possible implementations, each support assembly includes at least three support members, and in the second direction, the at least three support members are arranged at equal intervals. This arrangement can ensure that the bending moments of the support members on the assembly body are the same, and the support is more stable.

[0028] In a second aspect, the present application also provides a photovoltaic roofing system, including a roofing system and a photovoltaic module as described above, wherein the module body is connected to the roofing system via a supporting module.

[0029] In this photovoltaic roof system, the roof system has a bearing surface, and the photovoltaic components are connected to the bearing surface through their own supporting components. The setting structure and position of the photovoltaic components' own supporting components can achieve stable and reliable support connection to the roof system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] FIG1 is a schematic diagram of the back side of a photovoltaic module provided in an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of direction A in Figure 1;

[0033] FIG3 is a schematic diagram of the back side of a second photovoltaic module provided in an embodiment of the present application;

[0034] FIG4 is a schematic diagram of direction A in FIG3 ;

[0035] FIG5 is a schematic diagram of the back side of a third photovoltaic module provided in an embodiment of the present application;

[0036] Figure 6 is a schematic diagram of direction A in Figure 5;

[0037] FIG7 is a schematic diagram of the back side of a fourth photovoltaic module provided in an embodiment of the present application;

[0038] FIG8 is a schematic diagram of direction A in FIG7 .

[0039] Reference numerals: 1 is the component body, 11 is the first side, 12 is the second side, 2 is the supporting component, and 21 is the supporting member. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0042] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0043] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] Support members such as back rails are directly set on the back of the photovoltaic module to facilitate the prefabrication of the photovoltaic module and the subsequent direct installation of the photovoltaic module on the roof. However, due to the large size of the photovoltaic module, it is subjected to large positive and negative loads, which makes the photovoltaic module deform greatly. If the support members on the photovoltaic module are not set in an appropriate position, the photovoltaic module may be easily damaged by the external load.

[0046] In view of this, referring to Figures 1-7, an embodiment of the present application provides a photovoltaic module, comprising a module body 1 and at least two sets of support assemblies 2; wherein the support assemblies 2 are connected to the lower surface of the module body 1, i.e., the back surface of the module body 1. The module body 1 may include a stacked cover plate, an encapsulation layer, a cell group, and a backsheet. The module body 1 has two oppositely disposed first sides 11 and two oppositely disposed second sides 12. The first sides 11 and the second sides 12 are perpendicular. The length of the first side 11 is less than, greater than, or equal to the length of the second side 12, which is not limited herein. For example, the length of the first side 11 may be 900mm to 1500mm, and the length of the second side 12 may be 1500mm to 3000mm. At least two groups of support assemblies 2 are arranged along a first direction, which is parallel to the first side 11. Each group of support assemblies 2 includes one or more support members 21, and the multiple support members 21 are arranged along a second direction, which is parallel to the second side 12. Along the first direction, the support assemblies 2 at both ends of the at least two groups of support assemblies 2 are respectively arranged at the edge positions of the two second sides 12. Along the first direction, the distance between the corresponding support members 21 of two adjacent support assemblies 2 is expressed as l b1 , the equivalent thickness of the component body 1 is t eq , the allowable stress of the component body 1 is [σ], the pressure on the surface of the component body 1 is P, and the bending moment coefficient of the component body 1 is k m When the destructive stress generated by the photovoltaic module under the load is less than the allowable stress of the photovoltaic module, the support position of the support member 21 obtained at this time can meet the requirements of support stability and reliability. According to the formula The distance l of the simply supported part in the first direction is obtained b1 satisfy:

[0047] It should be noted that the equivalent thickness of the module body 1 is related to the material and dimensions of the cover and back panels used for the module body 1. If the cover is a glass cover and the back panel is a non-glass material, the load-bearing portion of the module body 1 is primarily the glass cover panel, and the equivalent thickness of the module body 1 is the thickness of the glass cover panel. If the cover is a glass cover panel and the back panel is a glass back panel, the load-bearing portions of the module body 1 are primarily the glass cover panel and the glass back panel, and the equivalent thickness of the module body 1 is related to the thickness of the glass cover panel and the glass back panel. The allowable stress of the module body 1 can be obtained by looking up industry specifications. Generally, industry specifications specify the strength values ​​for glass at different locations within a certain thickness range, which are referred to as the allowable stress. The bending moment coefficient of the module body 1 is also related to the material and dimensions of the cover and back panels of the module body 1. The bending moment coefficient can be found in industry silicon wafer data.

[0048] For example, the present application does not limit the specific structure of the support member 21. As long as it can have a certain supporting connection area with the back of the component body 1 and can play a supporting role, the support member 21 and the back of the component body 1 can be fixed by bonding, or the support member 21 located at the edge of the back of the component body 1 can be mechanically connected to the component body 1 by snapping or supporting. No specific limitation is made here. When each group of support components 2 includes one support member 21, as shown in Figures 1 to 4, the supporting connection surface between each support member 21 and the component body 1 is a strip-shaped connection surface extending along the second direction, so as to improve the stability of the support of the component body 1 by the support member 21. For each group of support components 2 including only one support member 21, as shown in Figures 1 and 2, there can be a gap between the two ends of each support member 21 and the two second sides 12, or, as shown in Figures 3 and 4, the two ends of each support member 21 extend to the edges of the two second sides 12, as long as a simple support portion is formed between the support members 21 in the first direction. When each group of support components 2 includes multiple support members 21, there can be two, three, four or more support members, as shown in Figures 5 and 6, the two support members 21 at both ends of each group of support components 2 can have a gap between them and the two second sides 12, or as shown in Figures 7 and 8, the two support members 21 at both ends of each group of support components 2 are respectively arranged at the edges of the two second sides 12, which is not limited in this embodiment.

[0049] When the above technical solution is adopted, the photovoltaic module itself has a module body 1 and a support module 2 pre-connected together. The module body 1 is a rectangular plate structure with a pair of first sides 11 and a pair of second sides 12. The first sides 11 and the second sides 12 are perpendicular. At least two groups of support modules 2 are arranged in a direction parallel to the first sides 11. Along the first direction, the support modules 2 at both ends of at least two groups of support modules 2 are respectively arranged at the edge positions of the two second sides 12 of the module body 1, that is, there is no overhanging cantilever structure between the support module 2 and the adjacent second sides 12. The support method of the photovoltaic module in the first direction can be treated as a simply supported beam. A section between two adjacent support members 21 arranged in a direction parallel to the first side 11 on the module body 1 forms a simply supported portion. The distance of the simply supported portion is expressed as l b1 . The allowable stress and bending moment coefficient of the component body 1 are determined according to the material and size of the cover and back plate selected for the component body 1, and the equivalent thickness is determined according to the material and thickness of the cover and back plate of the component body 1. When the structure, material and size of the component body 1 and the external load are determined, the distance of the simply supported part is designed to satisfy the above formula. The arrangement position of the support member 21 on the component body 1 can ensure that when the photovoltaic module is actually subjected to external loads such as wind pressure, wind suction, snow accumulation, hail, and trampling, in the first direction, the deformation distribution of the parts of the component body 1 located on both sides of the support member 21 along the gravity direction is uniform, the stress generated is roughly the same, the stress is small, and the position setting of the support member 21 is more reasonable, thereby improving the support stability and reliability of the photovoltaic module. By optimizing the position and design of the support member 21, the anti-hidden cracking ability of the photovoltaic module is effectively improved, and it can resist the influence of various environmental factors, thereby ensuring the stable operation of the photovoltaic module.

[0050] Furthermore, in order to make the supporting position of the support member 21 safer and more reliable, b1 satisfy: Thus, by adding a safety factor to the formula, the preferred setting position of the support member 21 in actual engineering applications is better satisfied to ensure that the obtained l b1 The value can meet the support stability requirements of photovoltaic modules.

[0051] As shown in FIG5 to FIG8, each support assembly 2 includes at least two support members 21 arranged along the second direction; in the same support assembly 2, the distance between two adjacent support members 21 is represented by l b2 , according to the formula The distance l of the simply supported part in the second direction is obtained b2 satisfy:

[0052] When the above technical solution is adopted, in the second direction, at least two support members 21 are also provided in the same second direction, and a simply-branched portion is also formed between two adjacent support members 21. Similar to the first direction, in the same second direction, the distance l between the simply-branched portions formed by the arrangement positions of the support members 21 on the component body 1 is b2 satisfy: The arrangement position of the support member 21 on the component body 1 can ensure that when the photovoltaic component is actually subjected to external loads such as wind pressure, wind suction, snow accumulation, hail, and trampling, in the second direction, the deformation of the parts of the component body 1 located on both sides of the support member 21 along the gravity direction is evenly distributed, the stress generated is roughly the same, and the stress is relatively small. The position setting of the support member 21 is more reasonable, which improves the support stability and reliability of the photovoltaic component and further improves the photovoltaic component's ability to resist hidden cracks.

[0053] Furthermore, in order to make the supporting position of the support member 21 safer and more reliable, b2 satisfy: Thus, by adding a safety factor to the formula, the preferred setting position of the support member 21 in actual engineering applications is better satisfied to ensure that the obtained l b2 The value can meet the support stability requirements of photovoltaic modules and further improve the ability of photovoltaic modules to resist hidden cracks.

[0054] As shown in FIG5-FIG8, in some embodiments, for the case where each group of support components 2 includes at least two support members 21 arranged along the second direction; when l b2 ≤2l b1 When the simply supported portion l in the second direction b2 According to the formula Make confirmation.

[0055] And when l b2 >2l b1 When the simply supported part in the second direction is treated as a one-way beam, the stress calculation formula is After calculation and transformation, we get l b2 satisfy: In this way, when the distance between the two support members 21 in the second direction is much larger than the distance between the two support members 21 in the first direction, the support of the photovoltaic module can be treated as a one-way beam. The distance between the support members 21 in the second direction calculated according to this formula better meets the better setting position of the support members 21 in actual engineering applications, so as to ensure the obtained l b2 The value can meet the support stability requirements of photovoltaic modules.

[0056] Similarly, when l b1 ≤2l b2When the simply supported portion l in the first direction b1 According to the formula To confirm, when l b1 >2l b2 When the simply supported part in the first direction is treated as a one-way beam, the stress calculation formula is After calculation and transformation, we get l b1 satisfy: This embodiment optimizes the equivalent thickness of the component body 1. When the component body 1 is a single-glass component, that is, the cover plate of the component body 1 is a glass cover plate, the equivalent thickness t of the component body 1 is eq is the thickness of the single glass, that is, the thickness of the glass cover. When the module body 1 is a double glass module, that is, the cover of the module body 1 is a glass cover and the back panel is a glass back panel, the glass cover is the upper glass and the glass back panel is the lower glass. The thickness of the upper glass is t1 and the thickness of the lower glass is t2. Then the equivalent thickness of the module body 1 is t eq satisfy: Since the main material that can bear the load in the photovoltaic module is the glass material on one or two sides, the equivalent thickness of the module body 1 can only consider the thickness of the glass. If only one side has glass, the equivalent thickness of the module body 1 is the thickness of that layer of glass. If both sides have glass, the equivalent thickness and the thickness of the upper and lower layers of glass satisfy the above formula.

[0057] For example, when l b2 ≤2l b1 When the support member 21 on the photovoltaic module satisfies the following conditions in the first direction: At the same time, in the second direction In the case of the maximum pressure P on the surface of the component body 1 is 5400Pa and the allowable stress [σ] of the glass is 40MPa, the bending moment coefficient k of the component body 1 is m It can be selected from Table 1, wherein Table 1 shows a l provided in the embodiment of the present application. b1 / l b2 and the bending moment coefficient k of the component body 1 m For example, in order to obtain l b2 The lower limit of the maximum value of , according to the above formula, can be selected from Table 1 when l b1 / l b2 The maximum k when it is 1 m value, which is 0.1536. Calculate l b2 Here are some examples:

[0058] Table 1 is l b1 / l b2 The bending moment coefficient k of the component body m Correspondence table

[0059] Example 1: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 1.6 mm. The equivalent thickness of the module body 1 is calculated to be 2.3 mm. Calculate l b2 ≤206.2mm.

[0060] Example 2: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 2 mm. The equivalent thickness of the module body 1 is calculated to be 2.5 mm. Calculate l b2 ≤224.1mm.

[0061] Example 3: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 3.2 mm. The equivalent thickness of the module body 1 is calculated to be 3.4 mm. Calculate l b2 ≤304.8mm.

[0062] Example 4: The thickness of the upper glass of a double-glass module is 3.2 mm, and the thickness of the lower glass is 3.2 mm. The equivalent thickness of the module body 1 is calculated to be 4.0 mm. Calculate l b2 ≤358.6mm.

[0063] Example 5: The thickness of the single glass of a single glass module is 3.2 mm, so the equivalent thickness of the module body 1 is 3.2 mm. Calculate l b2 ≤286.9mm.

[0064] In another embodiment, when l b2 >2l b1 When b2 satisfy: When the maximum pressure P on the surface of the component body 1 is 5400Pa and the allowable stress [σ] of the glass is 40MPa, calculate l b2 Here are some examples:

[0065] Example 1: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 1.6 mm. The equivalent thickness of the module body 1 is calculated to be 2.3 mm. b2 ≤280.0mm.

[0066] Example 2: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 2 mm. The equivalent thickness of the module body 1 is calculated to be 2.5 mm. b2 ≤304.3mm.

[0067] Example 3: The thickness of the upper glass of a double-glass module is 2 mm, and the thickness of the lower glass is 3.2 mm. The equivalent thickness of the module body 1 is calculated to be 3.4 mm. b2 ≤413.8mm.

[0068] Example 4: The thickness of the upper glass of a double-glass module is 3.2 mm, and the thickness of the lower glass is 3.2 mm. The equivalent thickness of the module body 1 is calculated to be 4.0 mm. b2 ≤486.9mm.

[0069] Example 5: The thickness of the single glass of a single glass module is 3.2 mm, so the equivalent thickness of the module body 1 is 3.2 mm. Calculate l b2 ≤389.5mm.

[0070] Based on the above b2 ≤2l b1 and l b2 >2l b1 In two cases, we get l b2 The maximum value l b2max The lower limit is 206.2mm and the maximum value is l b2max The upper limit value is 486.9mm, that is, 206.2mm≤l b2max ≤486.9mm.

[0071] Similarly, when l b1 ≤2l b2 hour, l b2 / l b1 The corresponding relationship with the bending moment coefficient of the component body 1 and l b1 / l b2 The corresponding relationship is the same as that of the bending moment coefficient, which can be obtained from l b2 / l b1 Select the corresponding bending coefficient from the corresponding relationship with the bending moment coefficient of the component body 1. b1 >2l b2 hour, Then l b1 The maximum value l b1max The lower limit is 206.2mm and the maximum value is l b1max The upper limit value is 486.9mm, that is, 206.2mm≤l b1max ≤486.9mm.

[0072] That is, no matter whether it is the first direction or the second direction, as long as it is in the same direction, the maximum distance between each two adjacent support members 21 is expressed as l bmax , meeting 206.2mm≤l bmax ≤486.9mm.

[0073] As shown in Figures 1, 3, 5 and 7, this embodiment optimizes the number of support members 21 arranged along the first direction on the photovoltaic module, wherein the length of the first side 11 is L1, and the length of the second side 12 is L2; ​​along the first direction, the support assemblies 2 at both ends of at least two groups of support assemblies 2 are respectively arranged at the edge positions of the two second sides 12 of the module body 1; b1max l b1 The maximum value; the number of support components 2 arranged along the same first direction is expressed as m, the width of each support member 21 in the first direction is x, generally 5mm≤x≤30mm, then symbol Indicates rounding up. By transforming this formula, we get

[0074] For example, when hour, Rounded up to 2, it means that at least two support members 21 are required, and the number of support members 21 arranged in the first direction m≥2 can meet the requirements of support stability and reliability; when hour, Rounded up to 3, it means that at least three support members 21 are required, and the number of support members 21 arranged in the first direction m≥3 can meet the requirements of support stability and reliability; hour, Rounding up to 3 indicates that at least three support members 21 are required, and the number of support members 21 arranged in the first direction m≥3, which can meet the requirements of support stability and reliability.

[0075] Specifically, when the module body 1 is a double-glass module, the thickness of the upper glass of the double-glass module is 2 mm, the thickness of the lower glass is 1.6 mm, the length of the first side 11 of the module body 1 is 1134 mm, the length of the second side 12 is 1722 mm, the width x of each support member 21 in the first direction is 20 mm, the maximum pressure P on the surface of the module body 1 is 5400 Pa, and the allowable stress [σ] of the glass is 40 MPa, when applied to a photovoltaic module with the support components 2 at both ends arranged at the edge of the second side 12 along the first direction, as shown in Figures 1, 3, 5 and 7, at this time:

[0076] Calculate the equivalent thickness t of the component body 1 eq is 2.3mm, according to the formula Find l b1 ≤280.0mm, l b1max =280.0mm, according to the formula The number m of the support members 21 arranged along the same first direction is calculated to be ≥5.

[0077] Thus, based on the length of the first side 11, the maximum distance between two adjacent support members 21 in the first direction and the width of the support member 21 in the first direction, the minimum number of support members 21 arranged in the same first direction can be calculated to meet the support requirements.

[0078] As shown in FIG7 , this embodiment optimizes the number of support members 21 arranged along the second direction on the photovoltaic module. The length of the first side 11 is L1, and the length of the second side 12 is L2. Along the second direction, the support members 21 at both ends of each group of support assemblies 2 are respectively arranged at the edge positions of the two first sides 11 of the module body 1. b2max l b2 The maximum value; the width of each support member 21 in the second direction is s, the number of support members 21 arranged along the same second direction is expressed as k, the width of each support member 21 in the second direction is s, generally 5mm≤s≤30mm, then symbol Indicates rounding up. By transforming this formula, we get

[0079] For example, when hour, Rounded up to 2, it means that at least two support members 21 are required, and the number of support members 21 arranged in the second direction k≥2 can meet the requirements of support stability and reliability; when hour, Rounded up to 3, the number of support members 21 arranged in the second direction k≥3, which can meet the requirements of support stability and reliability; hour, Rounding up to 3, similarly, the number k of the support members 21 arranged in the second direction is ≥ 3, which can meet the requirements of support stability and reliability.

[0080] For example, when the module body 1 is a double-glass module, the thickness of the upper glass of the double-glass module is 2 mm, the thickness of the lower glass is 1.6 mm, the length of the first side 11 of the module body 1 is 1134 mm, the length of the second side 12 is 1722 mm, the width s of each support member 21 in the second direction is 30 mm, the maximum pressure P on the surface of the module body 1 is 5400 Pa, and the allowable stress [σ] of the glass is 40 MPa, when applied to a photovoltaic module with the support members 21 at both ends arranged at the edge of the first side 11 along the second direction, as shown in FIG7 , at this time:

[0081] Calculate the equivalent thickness t of the component body 1 eq is 2.3mm, according to the formula Find l b2 ≤ 280.0mm, l b2max=280.0mm, according to the formula The number k of the support members 21 arranged along the same second direction is calculated to be ≥7.

[0082] For another example, when the module body 1 is a double-glass module, the thickness of the upper glass of the double-glass module is 2 mm, the thickness of the lower glass is 2 mm, the length of the first side 11 of the module body 1 is 1134 mm, the length of the second side 12 is 1722 mm, the width s of each support member 21 in the second direction is 30 mm, the maximum pressure P on the surface of the module body 1 is 5400 Pa, and the allowable stress [σ] of the glass is 40 MPa, when applied to a photovoltaic module in which the support members 21 at both ends are arranged at the edge of the first side 11 along the second direction, as shown in FIG7 , at this time:

[0083] Calculate the equivalent thickness t of the component body 1 eq is 2.5mm, according to the formula Find l b2 ≤304.3mm, l b2max =304.3mm, according to the formula The number k of the support members 21 arranged along the same second direction is calculated to be ≥7.

[0084] For another example, when the module body 1 is a double-glass module, the thickness of the upper glass of the double-glass module is 3.2 mm, the thickness of the lower glass is 3.2 mm, the length of the first side 11 of the module body 1 is 1134 mm, the length of the second side 12 is 1722 mm, the width s of each support member 21 in the second direction is 30 mm, the maximum pressure P on the surface of the module body 1 is 5400 Pa, and the allowable stress [σ] of the glass is 40 MPa, when applied to a photovoltaic module with the support members 21 at both ends arranged at the edge of the first side 11 along the second direction, as shown in FIG7 , at this time:

[0085] Calculate the equivalent thickness t of the component body 1 eq is 4.0mm, according to the formula Find l b2 ≤486.9mm, l b2max =486.9mm, according to the formula The number k of the support members 21 arranged along the same second direction is calculated to be ≥5.

[0086] When adopting the above technical solution, based on the side length of the second side 12, the maximum distance between two adjacent support members 21 in the second direction and the width of the support member 21 in the second direction, the minimum number of support members 21 arranged in the same second direction can be calculated to meet the support requirements.

[0087] As shown in FIG7 , in some possible implementations, each support assembly 2 includes at least two support members 21 arranged along the second direction, with the support members 21 at both ends of each support assembly 2 disposed at the edges of the two first sides 11 of the module body 1. In this manner, there is no overhanging cantilever structure between the support assembly 2 and the adjacent first side 11, and the support method for the photovoltaic module in the second direction can be treated as a simply supported beam.

[0088] As shown in Figures 1, 3, 5, and 7, in some embodiments, the number of support assemblies 2 is at least three, for example, three, four, five, or more, and the support assemblies 2 are evenly spaced in the first direction. This arrangement ensures that the bending moments between the support members 21 on the assembly body 1 are equal, resulting in more stable support.

[0089] Similarly, as shown in Figures 5-8, each support assembly 2 includes at least three support members 21, for example, three, four, five, or more. These support members 21 are evenly spaced in the second direction. This arrangement ensures that the bending moments of each support member 21 on the assembly body 1 are the same, providing more stable support.

[0090] Based on the photovoltaic components described in any of the above embodiments, an embodiment of the present application also provides a photovoltaic roof system, including a roof system and a photovoltaic component, wherein the photovoltaic component is the photovoltaic component described in any of the above embodiments, and the component body 1 of the photovoltaic component is connected to the roof system through a support component 2.

[0091] In this photovoltaic roof system, the roof system has a bearing surface, and the photovoltaic module is connected to the bearing surface through its own support component 2. Specifically, the photovoltaic module is connected to the bearing surface through its own support member 21. The setting structure and position of the photovoltaic module's own support component 2 can achieve the photovoltaic module stably and reliably supported and connected to the roof system, which has the same beneficial effects as the photovoltaic modules in the above embodiments and will not be repeated here.

Claims

1. A photovoltaic module, characterized in that: include: A component body and at least two groups of support components connected to the lower surface of the component body, the component body having two oppositely disposed first sides and two oppositely disposed second sides, the first sides being perpendicular to the second sides; the at least two groups of support components are arranged along a first direction, the first direction is parallel to the first sides, each group of support components comprises one or more support members, the multiple support members are arranged along a second direction, the second direction is parallel to the second sides; Along the first direction, the support assemblies at both ends of the at least two groups of support assemblies are respectively arranged at edge positions of the two second sides; Along the first direction, the distance between the corresponding support members in two adjacent support assemblies is expressed as l b1 , the equivalent thickness of the component body is t eq , the allowable stress of the component body is [σ], the pressure on the surface of the component body is P, and the bending moment coefficient of the component body is k m , l b1 satisfy:

2. The photovoltaic module according to claim 1, characterized in that:

3. The photovoltaic module according to claim 1, characterized in that: Each group of the support assemblies comprises at least two support members arranged along the second direction; In the same support assembly, the distance between two adjacent support members is represented by l b2 , l b2 satisfy:

4. The photovoltaic module according to claim 3, characterized in that:

5. The photovoltaic module according to claim 1, characterized in that: Each group of the support assemblies comprises at least two support members arranged along the second direction; In the same support assembly, the distance between two adjacent support members is represented by l b2 , when l b2 >2l b1 When b2 satisfy:

6. The photovoltaic module according to any one of claims 1 to 5, characterized in that: Each group of support components includes at least two support members arranged along the second direction, and the support members at both ends of each group of support components are respectively arranged at edge positions of two first sides.

7. The photovoltaic module according to any one of claims 1 to 5, characterized in that: The component body is a single-glass component, and the equivalent thickness of the component body is t eq is the thickness of single glass; or The component body is a double-glass component, the thickness of the upper glass is t1, the thickness of the lower glass is t2, and the equivalent thickness of the component body is t eq satisfy:

8. The photovoltaic module according to any one of claims 1 to 5, characterized in that: In the same direction, the maximum distance between each two adjacent support members is expressed as l bmax , meet 206.2mm≤l bmax ≤486.9mm.

9. The photovoltaic module according to any one of claims 1 to 5, characterized in that: The length of the first side is L1, and the length of the second side is L2; Along the first direction, the support components at both ends of the at least two groups of support components are respectively arranged at the edge positions of the two second sides of the component body; b1max for l b1 The maximum value; the number of the support components arranged along the same first direction is represented by m, the width of each support member in the first direction is x, symbol Indicates rounding up.

10. The photovoltaic module according to any one of claims 3 to 5, characterized in that: The length of the first side is L1, and the length of the second side is L2; Along the second direction, the support members at both ends of each group of the support components are respectively arranged at the edge positions of the two first sides of the component body; b2max for l b2 The maximum value; the number of the support members arranged along the same second direction is represented by k, and the width of each support member in the second direction is s, symbol Indicates rounding up.

11. The photovoltaic module according to any one of claims 1 to 5, characterized in that: The at least two groups of support components are specifically at least three groups of support components. In the first direction, the at least three groups of support components are arranged at equal intervals.

12. The photovoltaic module according to any one of claims 1 to 5, characterized in that: Each group of the support assemblies includes at least three support members, and in the second direction, the at least three support members are arranged at equal intervals.

13. A photovoltaic roof system, comprising a roof system, characterized in that: It also includes the photovoltaic component according to any one of claims 1 to 12, wherein the component body is connected to the roof system through the supporting component.

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