CN117544074A - Photovoltaic module and photovoltaic roofing system - Google Patents

Photovoltaic module and photovoltaic roofing system Download PDF

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Publication number
CN117544074A
CN117544074A CN202311519536.XA CN202311519536A CN117544074A CN 117544074 A CN117544074 A CN 117544074A CN 202311519536 A CN202311519536 A CN 202311519536A CN 117544074 A CN117544074 A CN 117544074A
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CN
China
Prior art keywords
support
edge
photovoltaic module
assembly body
module
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Pending
Application number
CN202311519536.XA
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Chinese (zh)
Inventor
钟宝申
章金平
石丰溢
张松
冯春暖
吕俊
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Longi Green Energy Technology Co Ltd
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Longi Green Energy Technology Co Ltd
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Priority to CN202311519536.XA priority Critical patent/CN117544074A/en
Publication of CN117544074A publication Critical patent/CN117544074A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/36—Connecting; Fastening
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/40—Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/63—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing modules or their peripheral frames to supporting elements
    • F24S25/632—Side connectors; Base connectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The application discloses photovoltaic module and photovoltaic roofing system relates to photovoltaic technical field to solve support piece on the photovoltaic module and set up unreasonable problem. The photovoltaic module includes: the assembly body and at least two groups of support assemblies connected to the lower surface of the assembly body, the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges, and the first edges and the second edges hang downStraight; at least two sets of support assemblies arranged in a first direction, the first direction being parallel to the first edge, each set of support assemblies including one or more support members arranged in a second direction, the second direction being parallel to the second edge; a first edge spacing exists between the support member in the support assembly adjacent the second edge and the second edge, the distance of the first edge spacing being denoted as l a1 The method comprises the steps of carrying out a first treatment on the surface of the In the first direction, the distance between corresponding supports in two adjacent support assemblies is denoted as l b1 The method comprises the steps of carrying out a first treatment on the surface of the In the same first direction, l a1 ＝1/3l b1 ～1/2l b1 . The position setting of support piece is reasonable, has improved support stability and reliability.

Description

Photovoltaic module and photovoltaic roofing system
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a photovoltaic module and a photovoltaic roofing system.
Background
Solar energy is a clean renewable energy source, in the development process of the photovoltaic industry at present, solar photovoltaic power generation systems are increasingly applied in China, distributed photovoltaic power stations are increasingly important, and photovoltaic modules are also increasingly important as important components of the photovoltaic power stations.
The photovoltaic module is installed on the roofing, because the photovoltaic module size is great, receives positive and negative load great for the deformation of photovoltaic module is great, and support piece on the photovoltaic module if set up unreasonably makes photovoltaic module receive the destruction under the external load effect easily.
Disclosure of Invention
The invention aims to provide a photovoltaic module and a photovoltaic roofing system, so as to optimize the setting position of a supporting piece on the photovoltaic module and improve the supporting stability and reliability of the photovoltaic module.
In order to achieve the above object, in a first aspect, the present invention provides a photovoltaic module comprising:
the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges, and the first edges are perpendicular to the second edges; at least two sets of support assemblies arranged in a first direction, the first direction being parallel to the first edge, each set of support assemblies including one or more support members arranged in a second direction, the second direction being parallel to the second edge;
a first edge spacing exists between the support member in the support assembly adjacent the second edge and the second edge, the distance of the first edge spacing being denoted as l a1 ；
In the first direction, the distance between corresponding supports in two adjacent support assemblies is denoted as l b1 ；
Wherein in the same first direction, l a1 ＝1/3l b1 ～1/2l b1 。
Under the condition of adopting the technical scheme, the photovoltaic module is provided with the module body and the supporting modules which are connected together, the module body is of a rectangular plate-shaped structure and is provided with a pair of first edges and a pair of second edges, the first edges and the second edges are vertical, at least two groups of supporting modules are arranged along the direction parallel to the first edges, a first adjacent edge interval exists between a supporting piece in the supporting module close to the second edge and the second edge, namely, an overhanging cantilever structure is formed from the second edge of the module body to a section between the supporting modules close to the second edge, and the distance between the first adjacent edges, namely, the overhanging distance of the overhanging cantilever structure is expressed as l a1 A simple support part is formed between two adjacent support pieces arranged along the direction parallel to the first edge, and the distance of the simple support part is denoted as l b1 The method comprises the steps of carrying out a first treatment on the surface of the The distance between the cantilever structure and the simple support part formed by the arrangement position of the supporting piece on the assembly body in the same direction parallel to the first side is l a1 ＝1/3l b1 ～1/2l b1 The position of arranging of this support piece on the subassembly body can be when the photovoltaic module actually bears external load such as wind pressure, wind inhale, snow accumulation, hail, trample, and on first direction, the part that the subassembly body is located the support piece both sides produces on the direction of gravity warp comparatively even, and the stress that produces is roughly the same, and support piece's position setting is more reasonable, has improved photovoltaic module's supporting stability and reliability.
In some possible implementations, the equivalent thickness of the component bodyAt t eq The allowable stress of the assembly body is [ sigma ]]The pressure intensity born by the surface of the component body is P; l (L) a1 The method meets the following conditions:and/or l b1 The method meets the following conditions: />Wherein k is m Is the bending moment coefficient of the assembly body; or l c The method meets the following conditions: />Wherein l c For the distance of the support close to both the first and the second side to the corner point of the assembly body closest to the support.
Under the condition of adopting the technical scheme, the allowable stress and the bending moment coefficient of the assembly body are determined according to the material and the size of the cover plate and the back plate selected by the assembly body, the equivalent thickness is determined according to the material and the thickness of the cover plate and the back plate of the assembly body, so that the deformation of the assembly body in the gravity direction generated by the parts positioned on the two sides of the support piece can be more uniform in order to meet the arrangement position of the support piece in the first direction, the generated stress is generally the same, and under the condition that the structure, the material and the size of the assembly body and the external load are determined, the distance between the first limb interval and the simple support part is designed to meet the above formula. The support piece which is close to the first side and the second side simultaneously reaches the nearest corner point of the component body, and the section of the support piece is also an overhanging cantilever structure, and when the distance of the overhanging cantilever structure meets the formula, the purpose of high support stability and reliability of the support piece can be achieved. Through optimizing the position and the design of the support piece, the hidden crack resistance of the photovoltaic module is effectively improved, the influence of various environmental factors can be resisted, and the stable operation of the photovoltaic module is ensured.
In some possible implementations, l a1 The method meets the following conditions:or l c Satisfy the following requirements：Thus, by adding a safety coefficient in the formula, the better setting position of the supporting piece in practical engineering application is more satisfied, so as to ensure the obtained L a1 And l c The support stability requirement of the photovoltaic module can be met, and the hidden crack resistance of the photovoltaic module is further improved.
In some possible implementations, l c ≤198.8mm。
In some possible implementations, the assembly body is a single-glass assembly, the equivalent thickness t of the assembly body eq Is the thickness of single glass; or the assembly body is a double-glass assembly, and the thickness of the upper glass is t 1 The thickness of the lower glass is t 2 Equivalent thickness t of the assembly body eq The method meets the following conditions:
under the condition of adopting the technical scheme, as the photovoltaic module can bear the load and is mainly made of glass materials positioned on one side or two sides, the equivalent thickness of the module body can only consider the thickness of the glass, if only one side is provided with the glass, the equivalent thickness of the module body is the thickness of the layer of glass, and if two sides are provided with the glass, the equivalent thickness and the thicknesses of the upper layer of glass and the lower layer of glass meet the above formula.
In some possible implementations, l a1 ＝2/5l b1 、l a1 ＝4/11l b1 Or l a1 ＝6/13l b1 When l a1 ＝2/5l b1 When the photovoltaic module is used, the stress distribution of the parts of the module body, which are positioned on the two sides of the support piece, is uniform, the deformation is basically the same, and the support stability and reliability of the photovoltaic module are higher; when l a1 ＝4/11l b1 When the assembly body is in a state, the parallelism change of the two opposite surfaces of the assembly body is minimum; when l a1 ＝6/13l b1 The deformation of the simple support part of the assembly body is minimum.
In some possible implementations, the photovoltaic moduleThe back rail is connected with the assembly body and the supporting piece through the back rail, the extending direction of the back rail is parallel to the first direction, and the allowable stress of the assembly body is [ sigma ]]The uniform load on the surface of the assembly body is q, and the cross-sectional moment of inertia determined by the cross-sectional shape of the back rail and the cross-sectional shape of the assembly body is I a The maximum distance from the neutral layer to the surface, determined by the shape of the back rail in combination with the cross-sectional shape of the assembly body, is y max ，l a1 The method meets the following conditions:
under the condition that the technical scheme is adopted, when the back rail is arranged on the photovoltaic module, the back rail spans the module body along the first direction, and the supporting position of the supporting piece is located on the back rail, so that the overall structure of the photovoltaic module bearing load is changed compared with the condition that only the module body is arranged, and the section moment of inertia and the distance from the neutral layer for obtaining the first limb interval are required to be adjusted.
In some possible implementations, the first edge has a length L 1 The second side has a side length L 2 The method comprises the steps of carrying out a first treatment on the surface of the A first adjacent edge interval exists between two support pieces which are arranged along the same first direction and are positioned at the outermost side and each adjacent second edge; l (L) b1max Is l b1 Is the maximum value of (2); each support has a width x in a first direction, the number of supports arranged in the same first direction being denoted m,sign->Representing an upward rounding.
Under the condition of adopting the technical scheme, according to the side length of the first side, the first adjacent side interval, the maximum distance between two adjacent supporting pieces in the first direction and the width of the supporting pieces in the first direction, the minimum number of the supporting pieces distributed in the same first direction can be calculated, and the supporting requirement can be met.
In some possible implementations, the at least two sets of support assemblies are specifically at least three sets of support assemblies, and in the first direction, the at least three sets of support assemblies are disposed at equal intervals. By the arrangement, bending moment among the supporting pieces on the assembly body is the same, and the supporting is more stable.
In some possible implementations, each set of support assemblies includes at least three supports that are equally spaced in the second direction. By the arrangement, the bending moment of each support piece on the assembly body is the same, and the support is more stable.
In some possible implementations, each set of support assemblies includes at least two supports arranged in a second direction; a second edge spacing is provided between the support member adjacent the first edge and the first edge, the distance of the second edge spacing being denoted as l a2 The method comprises the steps of carrying out a first treatment on the surface of the In the second direction, the distance between two adjacent supports is denoted as l b2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, in the same second direction, l a2 ＝1/3l b2 ～1/2l b2 。
Under the condition of adopting the technical proposal, at least two supporting pieces are also arranged in the same second direction in parallel with the second edge, a second interval exists between the supporting piece close to the first edge and the first edge, namely, in the second direction, an overhanging cantilever structure is also formed between the first edge of the component body and the supporting piece, a simple supporting part is also formed between two adjacent supporting pieces, the distance between the overhanging cantilever structure formed by the arrangement position of the supporting piece on the component body and the simple supporting part is l in the same direction parallel with the second edge, and the distance between the overhanging cantilever structure and the simple supporting part is l a2 ＝1/3l b2 ～1/2l b2 The position of the support piece on the assembly body can be changed uniformly in the gravity direction generated by the parts of the assembly body, which are positioned on the two sides of the support piece, in the second direction when the photovoltaic assembly actually bears external loads such as wind pressure, rain and snow, and the generated stress is approximately the same, the position of the support piece is set more reasonably, and the support stability and reliability of the photovoltaic assembly are improved.
In some possible implementations, the component bodyEquivalent thickness t eq The allowable stress of the assembly body is [ sigma ]]The pressure intensity born by the surface of the component body is P; l (L) a2 The method meets the following conditions:and/or l b2 The method meets the following conditions: />Wherein k is m Is the bending moment coefficient of the assembly body. The setting positions of the support members in the first direction and the support members in the second direction satisfy the same conditions, and are not described herein.
In some possible implementations, the first edge has a length L 1 The second side has a side length L 2 The method comprises the steps of carrying out a first treatment on the surface of the Two support pieces which are arranged along the same second direction and are positioned at the outermost side are respectively separated from the adjacent first edges by a second edge interval; l (L) b2max Is l b2 Is the maximum value of (2); each support has a width s in the second direction, the number of supports arranged in the same second direction being denoted k,sign->Representing an upward rounding.
Under the condition of adopting the technical scheme, according to the side length of the second side, the second adjacent side interval, the maximum distance between two adjacent supporting pieces in the second direction and the width of the supporting pieces in the second direction, the minimum number of the supporting pieces distributed in the same second direction can be calculated, and the supporting requirement can be met.
In a second aspect, the invention also provides a photovoltaic roofing system, which comprises a roofing system and a photovoltaic module as described above, wherein the module body is connected with the roofing system through a support module.
In the photovoltaic roofing system, the roofing system is provided with a bearing surface, the photovoltaic module is connected with the bearing surface through the supporting module of the photovoltaic module, and the photovoltaic module can be stably and reliably supported and connected on the roofing system through the arrangement structure and the position of the supporting module of the photovoltaic module.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic back view of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic view of the direction A of FIG. 1;
fig. 3 is a schematic back view of a second photovoltaic module according to an embodiment of the present invention;
FIG. 4 is a schematic view of the direction A in FIG. 3;
fig. 5 is a schematic back view of a third photovoltaic module according to an embodiment of the present invention;
fig. 6 is a schematic back view of a fourth photovoltaic module according to an embodiment of the present invention;
FIG. 7 is a schematic view in the direction B in FIG. 6;
fig. 8 is a schematic back view of a fifth photovoltaic module according to an embodiment of the present invention;
fig. 9 is a schematic view in the direction a in fig. 8.
Reference numerals:
the assembly comprises an assembly body 1, a first side 11, a second side 12, a supporting assembly 2, a supporting piece 21 and a back rail 22.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention 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 for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing 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 operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The applicant finds that the support member such as the back rail is directly arranged on the back of the photovoltaic module, so that the photovoltaic module is convenient to prefabricate and directly mount with a roof subsequently, but because the photovoltaic module is large in size, the load applied to the photovoltaic module in the positive direction and the load applied in the negative direction are large, so that the deformation of the photovoltaic module is large, and if the support member on the photovoltaic module is unreasonable in arrangement position, the photovoltaic module is easily damaged under the action of external load.
In view of this, referring to fig. 1-5, embodiments of the present invention provide a photovoltaic module comprising a module body 1 and at least two sets of support modules 2; wherein the support assembly 2 is connected to the lower surface of the assembly body 1, i.e. the back surface of the assembly body 1. The assembly body 1 may include a cover plate, a packaging layer, a battery sheet group and a back plate which are stacked, the assembly 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 side length of the first sides 11 is smaller than, greater than or equal to the side length of the second sides 12, and the side length of the first sides 11 may be 900mm to 1500mm, and the side length of the second sides 12 may be 1500mm to 3000mm, for example. At least two sets of support assemblies 2 are arranged along a first direction, the first direction being parallel to the first edge 11, each set of support assemblies 2 comprising one or more support members 21, the plurality of support members 21 being arranged along a second direction, the second direction being parallel to the second edge 12; there is a first edge spacing between the support member 21 in the support assembly 2 adjacent the second edge 12 and the second edge 12, the distance of the first edge spacing being denoted as l a1 The method comprises the steps of carrying out a first treatment on the surface of the In the first direction, the distance between the corresponding supports 21 in two adjacent support assemblies 2 is denoted as l b1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein in the same first direction, l a1 ＝1/3l b1 ～1/2l b1 。
For example, the specific structure of the supporting member 21 is not limited in this application, as long as a certain supporting connection area can be provided to the back surface of the assembly body 1, the supporting member 21 and the back surface of the assembly body 1 can be fixed by adhesion, or the supporting member 21 located at the edge of the back surface of the assembly body 1 and the assembly body 1 are mechanically connected by clamping or supporting, and the specific structure is not limited herein. When each set of the supporting members 2 includes one supporting member 21, as shown in fig. 3, the supporting connection surface between each supporting member 21 and the assembly body 1 is a strip-shaped connection surface extending along the second direction, so as to improve the stability of the supporting of the assembly body 1 by the supporting member 21. When each set of support assemblies 2 includes a plurality of supports 21, there may be two, three, four or more.
Under the condition of adopting the technical scheme, the photovoltaic module is provided with a pre-connectionThe module body 1 and the support module 2 are connected together, the module body 1 is a rectangular plate-shaped structure and is provided with a pair of first edges 11 and a pair of second edges 12, the first edges 11 and the second edges 12 are vertical, at least two groups of support modules 2 are arranged along the direction parallel to the first edges 11, a first adjacent edge interval exists between the support piece 21 in the support module 2 close to the second edges 12 and the second edges 12, namely, a section between the second edges 12 of the module body 1 and the adjacent support module 2 forms an overhanging cantilever structure, and the distance between the first adjacent edges, namely, the overhanging distance of the overhanging cantilever structure is expressed as l a1 A section of the module body 1 between two adjacent support members 21 arranged in a direction parallel to the first edge 11 forms a simple portion, the distance of which is denoted by l b1 The method comprises the steps of carrying out a first treatment on the surface of the The distance between the cantilever structure and the simple support formed by the arrangement of the support 21 on the module body 1 in the same direction parallel to the first edge 11 is of the order of a1 ＝1/3l b1 ～1/2l b1 The support piece 21 is arranged at the position on the assembly body 1, when the photovoltaic assembly actually bears external loads such as wind pressure, wind suction, snow accumulation, hail, trampling and the like, deformation of the parts, located at the two sides of the support piece 21, of the assembly body 1 in the first direction is uniformly distributed along the gravity direction, the generated stress is generally the same, the stress is small, the position of the support piece 21 is set more reasonably, and the support stability and reliability of the photovoltaic assembly are improved. Through optimizing the position and the design of the support piece, the hidden crack resistance of the photovoltaic module is effectively improved, the influence of various environmental factors can be resisted, and the stable operation of the photovoltaic module is ensured.
Illustratively, l a1 ＝2/5l b1 、l a1 ＝4/11l b1 Or l a1 ＝6/13l b1 When l a1 ＝2/5l b1 During the process, the stress of the parts of the assembly body 1 positioned on the two sides of the support piece 21 is uniformly distributed, the deformation is basically the same, and the support stability and reliability of the photovoltaic assembly are higher; when l a1 ＝4/11l b1 The parallelism variation of the opposite sides (front and back) of the module body 1 is minimized at the time; when l a1 ＝6/13l b1 Deformation of the simple portion of the module body 1The amount is minimal.
As shown in fig. 1, 3 and 5, further, when the damage stress generated by the photovoltaic module under the load is smaller 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. I.e. according to the formulaDeriving a first critical edge spacing l of the cantilever structure in a first direction a1 The method meets the following conditions: />According to the formula->Deriving l of the profile in the first direction b1 The method meets the following conditions:according to the formula->Deriving l c The method meets the following conditions: />Wherein l c In order to simultaneously approach the support 21 of the first side 11 and the second side 12 to the corner point of the module body 1 closest to the support 21, as shown in fig. 5, a section of the support 21 of the first side 11 and the second side 12 to the corner point closest to the module body 1 is also an overhanging cantilever structure, and the overhanging cantilever structure can achieve the purpose of high support stability and reliability of the support 21 when the distance satisfies the above formula.
It should be noted that, the equivalent thickness of the module body 1 is t eq The allowable stress of the module body 1 is [ sigma ]]The pressure intensity of the surface of the component body 1 is P, k m Is the bending moment coefficient of the assembly body 1. The equivalent thickness of the component body 1 is as follows with the material and size of the cover plate and the back plate selected by the component body 1And if the cover plate is a glass cover plate, the back plate is made of a non-glass material, the part of the component body 1 capable of bearing the load is mainly a glass cover plate, the equivalent thickness of the component body 1 is the thickness of the glass cover plate, if the cover plate is a glass cover plate, the back plate is a glass back plate, the part of the component body 1 capable of bearing the load is mainly a glass cover plate and a glass back plate, and the equivalent thickness of the component body 1 is related to the thicknesses of the glass cover plate and the glass back plate. The allowable stress of the assembly body 1 is obtained by searching industry specification data, and in general, the industry specification data prescribes strength values of different positions of glass within a certain thickness range, namely, the allowable stress. The bending moment coefficient of the assembly body 1 is also related to the material and the size of the cover plate and the back plate of the assembly body 1. In order to satisfy the arrangement position of the supporting member 21 in the first direction so that the deformation distribution in the gravitational direction generated by the portions of the assembly body 1 located on both sides of the supporting member is uniform, the generated stresses are substantially the same, the stresses are small, and in the case where the structure, material and dimensions of the assembly body 1 and the external load are determined, the first edge interval and the distance of the simple portion may be designed so as to satisfy the relationship expressed by the above formula.
The bending moment coefficient k of the assembly body 1 m Can be selected from table 1:
TABLE 1 l b1 /l b2 Bending moment coefficient k with the assembly body m Corresponding relation table of (a)
l b1 /l b2 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1.00
k m 0.1303 0.1317 0.1335 0.1355 0.1376 0.1398 0.1423 0.1449 0.1477 0.1506 0.1536
According to l in Table 1 b1 /l b2 Bending moment coefficient k with the assembly body 1 m Corresponding bending coefficients are selected to calculate l under different arrangement structures of the supporting pieces 21 b2 . Similarly, l b2 /l b1 Corresponding relation with bending moment coefficient of the assembly body 1, and l b1 /l b2 The corresponding relation with the bending moment coefficient is the sameCan be from l b2 /l b1 The bending coefficient corresponding to the bending moment coefficient of the component body 1 is selected from the corresponding relation, so that the l under the arrangement structure of different supporting pieces 21 can be calculated b1 。
Further, in order to make the supporting position of the supporting member 21 more secure, l a1 The method meets the following conditions:or l c The method meets the following conditions: />Thus, by adding a safety factor smaller than 1 to the formula, the better setting position of the support member 21 in practical engineering application is more satisfied, so as to ensure the obtained l a1 And l c The support stability requirement of the photovoltaic module can be met, and the hidden crack resistance of the photovoltaic module is further improved.
Illustratively, when the assembly body 1 is a single glass assembly, i.e., the cover plate of the assembly body 1 is a glass cover plate, the equivalent thickness t of the assembly body 1 eq The thickness of the single glass is the thickness of the glass cover plate. When the assembly body 1 is a dual-glass assembly, that is, the cover plate of the assembly body 1 is a glass cover plate, and the back plate is a glass back plate, the glass cover plate is an upper glass, the glass back plate is a lower glass, and the thickness of the upper glass is t 1 The thickness of the lower glass is t 2 Equivalent thickness t of the assembly body 1 eq The method meets the following conditions:
illustratively, when the surface of the assembly body 1 is subjected to a pressure Pmax of 5400Pa, the allowable stress [ sigma ] of the glass]When 40MPa is applied to the photovoltaic module with only the first edge interval, as shown in figure 1, l a1 ＝l c 。
Example 1: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 1.6mm, and the equivalent thickness of the assembly body 1 is calculated to be 2.3mm, and l is obtained a1 ＝l c ≤114.3mm。
Example 2: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.5mm, and l is obtained a1 ＝l c ≤124.3mm。
Example 3: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 3.2mm, the equivalent thickness of the assembly body 1 is calculated to be 3.4mm, and l is obtained a1 ＝l c ≤169.0mm。
Example 4: the thickness of the upper glass of the double-glass assembly is 3.2mm, the thickness of the lower glass is 3.2mm, the equivalent thickness of the assembly body 1 is calculated to be 4.0mm, and l is obtained a1 ＝l c ≤198.8mm；
Example 5: the thickness of the single glass component is 3.2mm, the equivalent thickness of the component body 1 is 3.2mm, and l is obtained a1 ＝l c ≤159.1mm。
To sum up, when l c When the thickness is less than or equal to 198.8mm, the stability and the reliability of the photovoltaic modules meet the requirements.
As shown in fig. 6 and 7, in some possible implementations, the photovoltaic module further includes a back rail 22, the module body 1 and the support 21 are connected by the back rail 22, the back rail 22 extends in a direction parallel to the first direction, and two ends of the back rail 22 extend to two opposite second sides 12. The back rail 22 may be a strip structure or a plate structure, the back rail 22 and the back surface of the module body 1 may be adhered and fixed, the contact connection surface between the back rail 22 and the module body 1 is a strip surface, at this time, the overhanging cantilever structure of the photovoltaic module in the first direction comprises the overhanging portion of the module body 1 and the overhanging portion of the back rail 22, and the bending moment formula of the fixedly connected cantilever beam is based onObtainable I a1 The method meets the following conditions: />Wherein the allowable stress of the assembly body 1 is [ sigma ]]The uniform load on the surface of the component body 1 is q, the uniform load on the surface of the component body 1 is uniformly distributed along the first direction, and the cross-section inertia determined by the cross-section shape of the back rail and the cross-section shape of the component body 1Moment is I a The maximum distance from the neutral layer to the surface, determined by the shape of the back rail in combination with the cross-sectional shape of the assembly body 1, is y max 。
With the above technical solution, in the case where the back rail 22 is provided in the photovoltaic module, since the back rail 22 spans the module body 1 along the first direction and the supporting position of the supporting member 21 is located on the back rail 22, the overall structure of the photovoltaic module that receives the load changes compared with the case where only the module body 1, and the cross-sectional moment of inertia I for obtaining the first edge interval is required a And a maximum distance y to the surface of the neutral layer max The adjustment is specifically performed according to the structural form of the back rail 22, and is not limited herein.
As shown in fig. 1, 3, 5, 6 and 8, the present embodiment optimizes the number of the supporting members 21 arranged along the first direction on the photovoltaic module, wherein the length of the first side 11 of the module body 1 is L 1 The second side 12 has a side length L 2 The method comprises the steps of carrying out a first treatment on the surface of the A first adjacent edge interval exists between two support pieces 21 which are arranged along the same first direction and are positioned at the outermost side and each adjacent second edge 12; l (L) b1max Is l b1 Is the maximum value of (2); the number of the supporting members 21 arranged in the same first direction is denoted by m, and the width of each supporting member 21 in the first direction is x, typically 5 mm.ltoreq.x.ltoreq.30 mm, thenSign->The expression is rounded up, and by deforming this formula, we get +.>
Illustratively, whenWhen (I)>The upward rounding is 2, which means that at least two supporting pieces 21 are needed, and the number m of the supporting pieces 21 distributed in the first direction is more than or equal to 2, so that the requirements of supporting stability and reliability can be met; when->When (I)>The upper rounding is 3, which means that at least three supporting pieces 21 are needed, and the number m of the supporting pieces 21 distributed in the first direction is more than or equal to 3, so that the requirements of supporting stability and reliability can be met; when->When (I)>The number m of the supporting pieces 21 distributed in the first direction is more than or equal to 3, and the requirement of supporting stability and reliability can be met.
Specifically, when the module body 1 is a dual-glass module, the thickness of the upper glass of the dual-glass module is 2mm, the thickness of the lower glass is 1.6mm, the length of the first edge 11 of the module body 1 is 1134mm, the length of the second edge is 1722mm, the width x of each support piece in the first direction is 20mm, the pressure P maximum born by the surface of the module body 1 is 5400Pa, and the allowable stress [ sigma ] of the glass is 40MPa, when the module is applied to a photovoltaic module with only the first edge interval, as shown in fig. 1, at this time:
obtaining the equivalent thickness t of the assembly body 1 eq 2.3mm, calculate l a1 114.3mm or less, if l a1 ＝2/5l b1 Obtaining l b1max = 285.75mm, according to the formulaThe number m of the supporting pieces 21 arranged in the same first direction is equal to or greater than 4.
In this way, according to the side length of the first side 11, the first adjacent side interval, the maximum distance between two adjacent supporting members 21 in the first direction, and the width of the supporting members 21 in the first direction, the minimum number of supporting members 21 arranged in the same first direction can be calculated, and the supporting requirement can be satisfied.
As shown in fig. 1, 3, 5, 6 and 8, in some embodiments, the number of support assemblies 2 is at least three, for example, three, four, five, etc. more groups, and in the first direction, the support assemblies 2 are disposed at equal intervals. By this arrangement, the bending moment between the supporting pieces 21 on the assembly body 1 can be the same, and the supporting is more stable.
Similarly, each set of support assemblies 2 comprises at least three supports 21, which may for example be three, four, five etc. more, these supports 21 being equally spaced in the second direction. By this arrangement, the bending moment of each support piece 21 on the assembly body 1 can be the same, and the support is more stable.
As shown in fig. 5, in this embodiment, each group of support members 2 includes at least two support members 21 arranged along the second direction on the basis of having a first facing edge spacing between the support members 21 and the second edge 12; there is also a second edge spacing between the support 21 adjacent the first edge 11 and the first edge 11, the distance of the second edge spacing being denoted as l a2 The method comprises the steps of carrying out a first treatment on the surface of the In the second direction, the distance between two adjacent supports 21 is denoted as l b2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, in the same second direction, l a2 ＝1/3l b2 ～1/2l b2 。
With the above technical solution, at least two supporting members 21 are also disposed in the same second direction parallel to the second side 12, and there is a second edge spacing between the supporting member 21 near the first side 11 and the first side 11, that is, in the second direction, an overhanging cantilever structure is also formed between the first side 11 of the module body 1 and the supporting member 21, a simple supporting portion is also formed between two adjacent supporting members 21 in the second direction, and in the same direction parallel to the second side 12 as in the first direction, the distance between the overhanging cantilever structure formed by the arrangement position of the supporting member 21 on the module body 1 and the simple supporting portion is l a2 ＝1/3l b2 ～1/2l b2 The support piece 21 is arranged at the position on the assembly body 1, when the photovoltaic assembly actually bears external loads such as wind pressure, wind suction, snow accumulation, hail, trampling and the like, the deformation of the assembly body 1, which is positioned at the two sides of the support piece 21 and is generated in the gravity direction, is uniformly distributed in the second direction, the generated stress is approximately the same, the stress is smaller, the position of the support piece 21 is more reasonable, and the support stability and reliability of the photovoltaic assembly are improved.
For the condition that the photovoltaic module is provided with a second limb interval and a simple support part in the second direction, the setting principle of the second limb interval is the same as that of the first limb interval, and when the damage stress generated by the photovoltaic module under the action of bearing load is smaller than the allowable stress of the photovoltaic module, the support position of the support piece 21 can meet the requirements of support stability and reliability. I.e. according to the formulaDeriving a second critical edge spacing l of the cantilever structure in a second direction a2 The method meets the following conditions: />According to the formula->Deriving l of the profile in the second direction b2 The method meets the following conditions:the conditions satisfied by the arrangement positions of the support 21 in the first direction and the support 21 in the second direction are the same, and will not be described here again. The first edge interval and the first edge interval may be the same or different, and the length of the simple branch portion in the first direction and the second direction may be the same or different.
Illustratively, l a2 ＝2/5l b2 、l a2 ＝4/11l b2 Or l a2 ＝6/13l b2 When l a2 ＝2/5l b2 In the second direction, the module body 1 is located at the supportThe stress of the parts on the two sides of the photovoltaic module 21 is uniformly distributed, the deformation is basically the same, and the support stability and reliability of the photovoltaic module are higher; when l a2 ＝4/11l b2 The parallelism of the opposite sides of the assembly body 1 is minimally changed during the process; when l a2 ＝6/13l b2 In this case, the deformation amount of the simple portion of the module body 1 is minimized.
In the case where the photovoltaic module has both the first and second adjacent side intervals, as shown in fig. 5, the distance from the support 21, which is close to both the first and second sides 11 and 12, to the corner point closest to the support 21 in the module body 1
For example, when the surface of the module body 1 is subjected to a pressure Pmax of 5400Pa and the allowable stress [ sigma ] of the glass is 40MPa
Example 1: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 1.6mm, and the equivalent thickness of the assembly body 1 is calculated to be 2.3mm, and l is obtained a1 ≤114.3mm，l a2 ≤114.3mm，l c ≤161.6mm。
Example 2: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.5mm, and l is obtained a1 ≤124.3mm，l a2 ≤124.3mm，l c ≤175.8mm。
Example 3: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 3.2mm, the equivalent thickness of the assembly body 1 is calculated to be 3.4mm, and l is obtained a1 ≤169.0mm，l a2 ≤169.0mm，l c ≤239.0mm。
Example 4: the thickness of the upper glass of the double-glass assembly is 3.2mm, the thickness of the lower glass is 3.2mm, the equivalent thickness of the assembly body 1 is calculated to be 4.0mm, and l is obtained a1 ≤198.8mm，l a2 ≤198.8mm，l c ≤281.1mm；
Example 5: the thickness of the single glass component is 3.2mm, the equivalent thickness of the component body 1 is 3.2mm, and l is obtained a1 ≤159.1mm，l a2 ≤159.1mm，l c ≤225.0mm。
As shown in fig. 5 and 8, the present embodiment optimizes the number of the supporting members arranged in the second direction on the photovoltaic module, and the length of the first side 11 is L 1 The second side 12 has a side length L 2 The method comprises the steps of carrying out a first treatment on the surface of the Two support pieces 21 which are arranged along the same second direction and are positioned at the outermost side are respectively adjacent to the first edges 11, and a second adjacent edge interval exists between the two support pieces; l (L) b2max Is l b2 Is the maximum value of (2); the number of the supporting pieces 21 arranged in the same second direction is denoted as k, and the width of each supporting piece 21 in the second direction is s, typically 5 mm.ltoreq.s.ltoreq.30 mm, the number of the supporting pieces 21Sign->The expression is rounded up, and by deforming this formula, we get +.>
Illustratively, whenWhen (I)>The upward rounding is 2, which means that at least two supporting pieces 21 are needed, and the number k of the supporting pieces 21 distributed in the second direction is more than or equal to 2, so that the requirements of supporting stability and reliability can be met; when->When (I)>The number k of the supporting pieces 21 distributed in the second direction is more than or equal to 3 when the supporting pieces are rounded up to 3, so that the requirements of supporting stability and reliability can be met; when (when)When (I)>And the number k of the supporting pieces 21 distributed in the second direction is more than or equal to 3, and the requirements of supporting stability and reliability can be met.
For example, when the module body 1 is a dual-glass module, the thickness of the upper glass of the dual-glass module is 2mm, the thickness of the lower glass is 1.6mm, the length of the first side 11 of the module body 1 is 1134mm, the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction is 30mm, the pressure P maximum of the surface of the module body 1 is 5400Pa, and the allowable stress [ sigma ] of the glass is 40MPa, the module is applied to a photovoltaic module having both the first and second critical side intervals, as shown in fig. 5, at this time:
obtaining the equivalent thickness t of the assembly body 1 eq 2.3mm, calculate l a2 114.3mm or less, if l a2 ＝2/5l b2 Obtaining l b2max = 285.75mm, according to the formulaThe number k of the supporting pieces 21 arranged along the same second direction is more than or equal to 6.
For another example, when the module body 1 is a dual glass module, the thickness of the upper glass of the dual glass module is 2mm, the thickness of the lower glass is 2mm, the length of the first side 11 of the module body 1 is 1134mm, the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction is 30mm, the pressure P maximum applied to the surface of the module body 1 is 5400Pa, and the allowable stress [ sigma ] of the glass is 40MPa, the module is applied to a photovoltaic module having both the first edge spacing and the second edge spacing, as shown in fig. 5, at this time:
obtaining the equivalent thickness t of the assembly body 1 eq 2.5mm, l a2 Not more than 124.3mm, if l a2 ＝2/5l b2 Obtaining l b2max = 310.75mm, according to the formulaFind the row along the same second directionThe number k of cloth support elements 21 is greater than or equal to 6.
For another example, when the module body 1 is a dual glass module, the thickness of the upper glass of the dual glass module is 3.2mm, the thickness of the lower glass is 3.2mm, the length of the first side 11 of the module body 1 is 1134mm, the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction is 30mm, the pressure P maximum applied to the surface of the module body 1 is 5400Pa, and the allowable stress [ sigma ] of the glass is 40MPa, the module is applied to a photovoltaic module having both the first edge spacing and the second edge spacing, as shown in fig. 5, at this time:
obtaining the equivalent thickness t of the assembly body 1 eq 4.0mm, l a2 198.8mm or less, if l a2 ＝2/5l b2 Obtaining l b2max =497mm, according to the formulaThe number k of the supporting pieces 21 arranged along the same second direction is equal to or greater than 4.
Under the condition of adopting the technical scheme, according to the side length of the second side 12, the second adjacent side interval and the maximum distance between two adjacent supporting pieces 21 in the second direction, the minimum number of the supporting pieces 21 arranged in the same second direction can be calculated, and the supporting requirement can be met.
As shown in fig. 8 and 9, when the photovoltaic module has the second edge spacing, the extending direction of the back rail 22 of the photovoltaic module may also be parallel to the second direction, and two ends of the back rail 22 extend to two opposite first edges 11. As in the case of the back rail 22 of FIG. 6, which has an extension direction parallel to the first direction, the overhanging cantilever structure of the photovoltaic module in the second direction comprises the overhanging portion of the module body 1 and the overhanging portion of the back rail 22, and the bending moment formula of the rigid cantilever beam is adoptedObtainable I a2 The method meets the following conditions: />
Under the condition of adopting the technical proposal, the pairIn the case that the photovoltaic module is provided with the back rail 22 extending along the second direction, since the back rail 22 spans the module body 1 along the second direction, and the supporting position of the supporting member 21 is located on the back rail 22, the overall structure of the photovoltaic module for bearing the load is changed compared with the case that only the module body 1 is provided, and the cross-sectional moment of inertia I for obtaining the second edge interval is required a And a maximum distance y to the surface of the neutral layer max The adjustment is specifically performed according to the structural form of the back rail 22, and is not limited herein.
Based on the photovoltaic module described in any one of the above embodiments, the embodiment of the present invention further provides a photovoltaic roofing system, which includes a roofing system and a photovoltaic module, where the photovoltaic module is the photovoltaic module described in any one of the above embodiments, and the module body 1 of the photovoltaic module is connected with the roofing system through the support module 2.
In this photovoltaic roofing system, roofing system has the loading surface, is connected with the loading surface with photovoltaic module through the support component 2 that self had, specifically, photovoltaic module is connected with the loading surface through the support piece 21 of taking on it, can realize through the setting up structure and the position of photovoltaic module self support component 2 that photovoltaic module is stable reliably to support and connect on roofing system, has the beneficial effect the same as photovoltaic module among the above each embodiment, and is not repeated here.

Claims (14)

1. A photovoltaic module, comprising:
the assembly comprises an assembly body and at least two groups of support assemblies connected to the lower surface of the assembly body, wherein the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges, and the first edges are perpendicular to the second edges; the at least two sets of support assemblies are arranged along a first direction, the first direction is parallel to the first edge, each set of support assemblies comprises one or more support members, the plurality of support members are arranged along a second direction, and the second direction is parallel to the second edge;
a first edge spacing exists between the support member and the second edge in the support assembly near the second edge, the first edge spacing is equal to the second edge spacingThe distance between the adjacent edges is denoted as l a1 ；
In the first direction, the distance between the corresponding support members in two adjacent support assemblies is denoted as l b1 ；
Wherein in the same first direction, l a1 ＝1/3l b1 ～1/2l b1 。
2. The photovoltaic module of claim 1, wherein the module body has an equivalent thickness t eq The allowable stress of the assembly body is [ sigma ]]The pressure intensity born by the surface of the component body is P;
the l is a1 The method meets the following conditions:and/or
The l is b1 The method meets the following conditions:wherein k is m A bending moment coefficient for the assembly body; or (b)
l c The method meets the following conditions:wherein l c A distance from the support to a corner point in the photovoltaic module closest to the support that is closer to both the first edge and the second edge.
3. The photovoltaic module of claim 2, wherein l is a1 The method meets the following conditions:or (b)
The l is c The method meets the following conditions:
4. a photovoltaic module according to claim 2 or 3, characterized in that l c ≤198.8mm。
5. A photovoltaic module according to claim 2 or 3, wherein the module body is a single-glass module, the equivalent thickness t of the module body eq Is the thickness of single glass; or (b)
The assembly body is a double-glass assembly, and the thickness of upper glass is t 1 The thickness of the lower glass is t 2 Equivalent thickness t of the assembly body eq The method meets the following conditions:
6. the photovoltaic module of claim 1, wherein l a1 ＝2/5l b1 、l a1 ＝4/11l b1 Or l a1 ＝6/13l b1 。
7. A photovoltaic module according to any one of claims 1-3, further comprising a back rail, the module body and the support being connected by the back rail, the back rail extending in a direction parallel to the first direction, the module body having an allowable stress [ σ ]]The uniform load on the surface of the assembly body is q, and the cross-sectional moment of inertia determined by the cross-sectional shape of the back rail combined with the cross-sectional shape of the assembly body is I a The maximum distance from the neutral layer to the surface, which is determined by the shape of the back rail and the sectional shape of the assembly body, is y max ，
l a1 The method meets the following conditions:
8. a photovoltaic module according to claim 2 or 3, wherein the first edge has a length L 1 The saidThe second side has a side length L 2 ；
The first adjacent side intervals are respectively arranged between the two support pieces which are arranged along the same first direction and are positioned at the outermost side and the second adjacent sides; l (L) b1max Is l b1 Is the maximum value of (2); each support has a width x in said first direction, the number of said supports arranged along the same said first direction being denoted m,sign->Representing an upward rounding.
9. A photovoltaic module according to any one of claims 1-3, wherein the at least two sets of support modules are in particular at least three sets of support modules, the at least three sets of support modules being equally spaced apart in the first direction.
10. A photovoltaic module according to any one of claims 1 to 3, wherein each set of the support modules comprises at least three of the support members, the at least three support members being equally spaced in the second direction.
11. A photovoltaic module according to any one of claims 1 to 3, wherein each set of the support assemblies comprises at least two supports arranged along the second direction; a second edge spacing exists between the support member and the first edge adjacent to the first edge, the distance of the second edge spacing being denoted as l a2 ；
In the second direction, the distance between two adjacent supports is denoted as l b2 ；
Wherein in the same second direction, l a2 ＝1/3l b2 ～1/2l b2 。
12. The photovoltaic module of claim 11, wherein the module body has an equivalent thickness t eq The allowable stress of the assembly body is [ sigma ]]The pressure intensity born by the surface of the component body is P;
the l is a2 The method meets the following conditions:and/or
The l is b2 The method meets the following conditions:wherein k is m Is a bending moment coefficient of the assembly body.
13. The photovoltaic module of claim 12, wherein the first edge has a length L 1 The side length of the second side is L 2 ；
The two support pieces which are arranged along the same second direction and are positioned at the outermost side are respectively adjacent to the first edges, and a second adjacent edge interval exists between the two support pieces; l (L) b2max Is l b2 Is the maximum value of (2); each support has a width s in the second direction, the number of supports arranged in the same second direction being denoted k,sign->Representing an upward rounding.
14. A photovoltaic roofing system comprising a roofing system, further comprising a photovoltaic module according to any one of claims 1-13, the module body being connected to the roofing system by the support module.
CN202311519536.XA 2023-11-14 2023-11-14 Photovoltaic module and photovoltaic roofing system Pending CN117544074A (en)

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